noun
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naphtha
|
any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents
|
naphtha: any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents
|
naphthalene
|
a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs
|
naphthalene: a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs
|
naphthol
|
either of two phenols derived from naphthalene
|
naphthol: either of two phenols derived from naphthalene
|
pyrene
|
a pale yellow crystalline hydrocarbon C16H10 extracted from coal tar
|
pyrene: a pale yellow crystalline hydrocarbon C16H10 extracted from coal tar
|
man-made_fiber
|
fiber created from natural materials or by chemical processes
|
man-made_fiber: fiber created from natural materials or by chemical processes
|
natural_fiber
|
fiber derived from plants or animals
|
natural_fiber: fiber derived from plants or animals
|
animal_fiber
|
fiber derived from animals
|
animal_fiber: fiber derived from animals
|
plant_fiber
|
fiber derived from plants
|
plant_fiber: fiber derived from plants
|
straw
|
plant fiber used e.g. for making baskets and hats or as fodder
|
straw: plant fiber used e.g. for making baskets and hats or as fodder
|
natural_gas
|
a fossil fuel in the gaseous state; used for cooking and heating homes
|
natural_gas: a fossil fuel in the gaseous state; used for cooking and heating homes
|
naval_brass
|
alpha-beta brass containing tin; resistant to sea water; Admiralty Metal is a trademark
|
naval_brass: alpha-beta brass containing tin; resistant to sea water; Admiralty Metal is a trademark
|
neat's-foot_oil
|
a pale yellow oil made from the feet and legs of cattle; used as a dressing for leather
|
neat's-foot_oil: a pale yellow oil made from the feet and legs of cattle; used as a dressing for leather
|
nebula
|
a medicinal liquid preparation intended for use in an atomizer
|
nebula: a medicinal liquid preparation intended for use in an atomizer
|
nerve_gas
|
a toxic gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system
|
nerve_gas: a toxic gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system
|
VX_gas
|
a highly lethal nerve agent used in chemical warfare; a toxic liquid that penetrates the skin or lungs to disrupt the nervous system and stop respiration; in combat VX gas is deployed by detonating a container over the target area and can persist in the environment up to several weeks after release
|
VX_gas: a highly lethal nerve agent used in chemical warfare; a toxic liquid that penetrates the skin or lungs to disrupt the nervous system and stop respiration; in combat VX gas is deployed by detonating a container over the target area and can persist in the environment up to several weeks after release
|
sarin
|
a highly toxic chemical nerve agent that inhibits the activity of cholinesterase
|
sarin: a highly toxic chemical nerve agent that inhibits the activity of cholinesterase
|
neuromuscular_blocking_agent
|
a substance that interferes with the neural transmission between motor neurons and skeletal muscles
|
neuromuscular_blocking_agent: a substance that interferes with the neural transmission between motor neurons and skeletal muscles
|
newspaper
|
cheap paper made from wood pulp and used for printing newspapers
|
newspaper: cheap paper made from wood pulp and used for printing newspapers
|
Nichrome
|
an alloy of nickel and chromium with high electrical resistance and an ability to withstand high temperatures; used for resistance heating elements
|
Nichrome: an alloy of nickel and chromium with high electrical resistance and an ability to withstand high temperatures; used for resistance heating elements
|
nickel-base_alloy
|
an alloy whose main constituent is nickel
|
nickel-base_alloy: an alloy whose main constituent is nickel
|
nickel_bronze
|
a bronze containing up to 30% nickel
|
nickel_bronze: a bronze containing up to 30% nickel
|
nickel_silver
|
a silver-white alloy containing copper and zinc and nickel
|
nickel_silver: a silver-white alloy containing copper and zinc and nickel
|
nickel_steel
|
an alloy steel containing nickel
|
nickel_steel: an alloy steel containing nickel
|
nicotinamide_adenine_dinucleotide
|
a coenzyme present in most living cells and derived from the B vitamin nicotinic acid; serves as a reductant in various metabolic processes
|
nicotinamide_adenine_dinucleotide: a coenzyme present in most living cells and derived from the B vitamin nicotinic acid; serves as a reductant in various metabolic processes
|
nicotinamide_adenine_dinucleotide_phosphate
|
a coenzyme similar to NAD and present in most living cells but serves as a reductant in different metabolic processes
|
nicotinamide_adenine_dinucleotide_phosphate: a coenzyme similar to NAD and present in most living cells but serves as a reductant in different metabolic processes
|
Ni-hard
|
cast iron to which nickel has been added to make it resist abrasion
|
Ni-hard: cast iron to which nickel has been added to make it resist abrasion
|
Ni-resist
|
cast iron consisting of graphite in a matrix of austenite
|
Ni-resist: cast iron consisting of graphite in a matrix of austenite
|
nitride
|
a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal)
|
nitride: a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal)
|
nitrobenzene
|
a poisonous oily water-soluble liquid used as a solvent and in the manufacture of aniline
|
nitrobenzene: a poisonous oily water-soluble liquid used as a solvent and in the manufacture of aniline
|
nitrofuran
|
derivative of furan used to inhibit bacterial growth
|
nitrofuran: derivative of furan used to inhibit bacterial growth
|
nitrogenase
|
an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
|
nitrogenase: an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
|
nuclease
|
general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units
|
nuclease: general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units
|
nucleic_acid
|
(biochemistry) any of various macromolecules composed of nucleotide chains that are vital constituents of all living cells
|
nucleic_acid: (biochemistry) any of various macromolecules composed of nucleotide chains that are vital constituents of all living cells
|
nucleoside
|
a glycoside formed by partial hydrolysis of a nucleic acid
|
nucleoside: a glycoside formed by partial hydrolysis of a nucleic acid
|
nucleotide
|
a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA)
|
nucleotide: a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA)
|
nurse_log
|
a large decomposing tree trunk that has fallen, usually in a forest; the decaying wood provides moisture and nutrients for a variety of insects and plants
|
nurse_log: a large decomposing tree trunk that has fallen, usually in a forest; the decaying wood provides moisture and nutrients for a variety of insects and plants
|
cellulose_acetate
|
an ester of acetic acid; used in fibers and fabrics; photographic films and varnishes
|
cellulose_acetate: an ester of acetic acid; used in fibers and fabrics; photographic films and varnishes
|
cellulose_triacetate
|
cellulose acetate that is relatively slow to burn; used instead of celluloid for motion-picture film
|
cellulose_triacetate: cellulose acetate that is relatively slow to burn; used instead of celluloid for motion-picture film
|
celluloid
|
highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics
|
celluloid: highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics
|
cellulose_xanthate
|
a cellulose ester obtained by treating cellulose with caustic soda
|
cellulose_xanthate: a cellulose ester obtained by treating cellulose with caustic soda
|
acrylic_fiber
|
polymerized from acrylonitrile
|
acrylic_fiber: polymerized from acrylonitrile
|
polyamide
|
a polymer containing repeated amide groups
|
polyamide: a polymer containing repeated amide groups
|
nylon
|
a thermoplastic polyamide; a family of strong resilient synthetic fibers
|
nylon: a thermoplastic polyamide; a family of strong resilient synthetic fibers
|
oakum
|
loose hemp or jute fiber obtained by unravelling old ropes; when impregnated with tar it was used to caulk seams and pack joints in wooden ships
|
oakum: loose hemp or jute fiber obtained by unravelling old ropes; when impregnated with tar it was used to caulk seams and pack joints in wooden ships
|
octane
|
any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent
|
octane: any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent
|
oil
|
a slippery or viscous liquid or liquefiable substance not miscible with water
|
oil: a slippery or viscous liquid or liquefiable substance not miscible with water
|
fixed_oil
|
nonvolatile animal or plant oil
|
fixed_oil: nonvolatile animal or plant oil
|
fusel_oil
|
a mixture of amyl alcohols and propanol and butanol formed from distillation of fermented liquors
|
fusel_oil: a mixture of amyl alcohols and propanol and butanol formed from distillation of fermented liquors
|
gas_oil
|
an oil formed through distillation of petroleum of intermediate boiling range and viscosity
|
gas_oil: an oil formed through distillation of petroleum of intermediate boiling range and viscosity
|
stand_oil
|
a thick oil comprised of linseed, tung, or soya oils which have been heated to over 300 C
|
stand_oil: a thick oil comprised of linseed, tung, or soya oils which have been heated to over 300 C
|
neroli_oil
|
an odoriferous yellow oil found in orange flowers and used in perfumery and as a flavoring
|
neroli_oil: an odoriferous yellow oil found in orange flowers and used in perfumery and as a flavoring
|
tall_oil
|
an oil derived from wood pulp and used in making soaps or lubricants
|
tall_oil: an oil derived from wood pulp and used in making soaps or lubricants
|
oil-hardened_steel
|
steel that is quenched in oil
|
oil-hardened_steel: steel that is quenched in oil
|
oilpaper
|
paper that has been made translucent and waterproof by soaking in oil
|
oilpaper: paper that has been made translucent and waterproof by soaking in oil
|
oleic_acid
|
a colorless oily liquid occurring as a glyceride; it is the major fatty acid in olive oil and canola oil; used in making soap and cosmetics and ointments and lubricating oils
|
oleic_acid: a colorless oily liquid occurring as a glyceride; it is the major fatty acid in olive oil and canola oil; used in making soap and cosmetics and ointments and lubricating oils
|
oleo_oil
|
obtained from beef fat; used in making margarine and soap and in lubrication
|
oleo_oil: obtained from beef fat; used in making margarine and soap and in lubrication
|
oleoresin_capiscum
|
an oleoresin extracted from the capsicum pepper plant
|
oleoresin_capiscum: an oleoresin extracted from the capsicum pepper plant
|
oligosaccharide
|
any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis
|
oligosaccharide: any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis
|
onionskin
|
a thin strong lightweight translucent paper used especially for making carbon copies
|
onionskin: a thin strong lightweight translucent paper used especially for making carbon copies
|
india_paper
|
a thin tough opaque paper used in fine books
|
india_paper: a thin tough opaque paper used in fine books
|
onyx
|
a chalcedony with alternating black and white bands; used in making cameos
|
onyx: a chalcedony with alternating black and white bands; used in making cameos
|
opaque_gem
|
a gemstone that is opaque
|
opaque_gem: a gemstone that is opaque
|
opopanax
|
an odorous gum resin formerly used in medicines
|
opopanax: an odorous gum resin formerly used in medicines
|
organophosphate
|
an insecticide that interferes with an insect's nervous system
|
organophosphate: an insecticide that interferes with an insect's nervous system
|
organophosphate_nerve_agent
|
any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds
|
organophosphate_nerve_agent: any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds
|
ormolu
|
brass that looks like gold; used to decorate furniture
|
ormolu: brass that looks like gold; used to decorate furniture
|
oxalacetate
|
a salt or ester of oxalacetic acid
|
oxalacetate: a salt or ester of oxalacetic acid
|
oxalacetic_acid
|
an acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates)
|
oxalacetic_acid: an acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates)
|
oxalate
|
a salt or ester of oxalic acid
|
oxalate: a salt or ester of oxalic acid
|
oxalic_acid
|
a toxic colorless crystalline organic acid found in oxalis and other plants; used as a bleach and rust remover and in chemical analysis
|
oxalic_acid: a toxic colorless crystalline organic acid found in oxalis and other plants; used as a bleach and rust remover and in chemical analysis
|
oxidase
|
any of the enzymes that catalyze biological oxidation
|
oxidase: any of the enzymes that catalyze biological oxidation
|
oxidation-reduction_indicator
|
an indicator that shows a reversible color change between oxidized and reduced forms
|
oxidation-reduction_indicator: an indicator that shows a reversible color change between oxidized and reduced forms
|
oxide
|
any compound of oxygen with another element or a radical
|
oxide: any compound of oxygen with another element or a radical
|
oxidoreductase
|
an enzyme that catalyzes oxidation-reduction
|
oxidoreductase: an enzyme that catalyzes oxidation-reduction
|
oxime
|
any compound containing the group -C=NOH
|
oxime: any compound containing the group -C=NOH
|
oxyacetylene
|
a mixture of oxygen and acetylene; used to create high temperatures for cutting or welding metals
|
oxyacetylene: a mixture of oxygen and acetylene; used to create high temperatures for cutting or welding metals
|
oxyacid
|
any acid that contains oxygen
|
oxyacid: any acid that contains oxygen
|
periodic_acid
|
any acid of iodine that contains oxygen
|
periodic_acid: any acid of iodine that contains oxygen
|
oxygenase
|
an oxidoreductase that catalyzes the incorporation of molecular oxygen
|
oxygenase: an oxidoreductase that catalyzes the incorporation of molecular oxygen
|
ozone
|
a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)
|
ozone: a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)
|
pad
|
a number of sheets of paper fastened together along one edge
|
pad: a number of sheets of paper fastened together along one edge
|
palmitic_acid
|
a saturated fatty acid that is the major fat in meat and dairy products
|
palmitic_acid: a saturated fatty acid that is the major fat in meat and dairy products
|
palmitin
|
an ester of glycerol and palmitic acid
|
palmitin: an ester of glycerol and palmitic acid
|
pantothenic_acid
|
a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods
|
pantothenic_acid: a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods
|
papain
|
a proteolytic enzyme obtained from the unripe papaya; used as a meat tenderizer
|
papain: a proteolytic enzyme obtained from the unripe papaya; used as a meat tenderizer
|
para_aminobenzoic_acid
|
a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers
|
para_aminobenzoic_acid: a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers
|
paraquat
|
a poisonous yellow solid used in solution as a herbicide
|
paraquat: a poisonous yellow solid used in solution as a herbicide
|
paper
|
a material made of cellulose pulp derived mainly from wood or rags or certain grasses
|
paper: a material made of cellulose pulp derived mainly from wood or rags or certain grasses
|
paper_tape
|
a long narrow strip of paper
|
paper_tape: a long narrow strip of paper
|
paper_toweling
|
absorbent paper used as toweling
|
paper_toweling: absorbent paper used as toweling
|
papier-mache
|
a substance made from paper pulp that can be molded when wet and painted when dry
|
papier-mache: a substance made from paper pulp that can be molded when wet and painted when dry
|
papyrus
|
paper made from the papyrus plant by cutting it in strips and pressing it flat; used by ancient Egyptians and Greeks and Romans
|
papyrus: paper made from the papyrus plant by cutting it in strips and pressing it flat; used by ancient Egyptians and Greeks and Romans
|
parchment
|
a superior paper resembling sheepskin
|
parchment: a superior paper resembling sheepskin
|
rice_paper
|
a thin delicate material resembling paper; made from the rice-paper tree
|
rice_paper: a thin delicate material resembling paper; made from the rice-paper tree
|
roofing_paper
|
a heavy paper impregnated with tar and used as part of a roof for waterproofing
|
roofing_paper: a heavy paper impregnated with tar and used as part of a roof for waterproofing
|
ola
|
leaf or strip from a leaf of the talipot palm used in India for writing paper
|
ola: leaf or strip from a leaf of the talipot palm used in India for writing paper
|
ticker_tape
|
a continuous thin ribbon of paper on which stock quotes are written
|
ticker_tape: a continuous thin ribbon of paper on which stock quotes are written
|
packing_material
|
any material used especially to protect something
|
packing_material: any material used especially to protect something
|
excelsior
|
thin curly wood shavings used for packing or stuffing
|
excelsior: thin curly wood shavings used for packing or stuffing
|
pantile
|
a roofing tile with a S-shape; laid so that curves overlap
|
pantile: a roofing tile with a S-shape; laid so that curves overlap
|
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