noun
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hydrate
|
any compound that contains water of crystallization
|
hydrate: any compound that contains water of crystallization
|
hydrazine
|
a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels
|
hydrazine: a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels
|
hydride
|
any binary compound formed by the union of hydrogen and other elements
|
hydride: any binary compound formed by the union of hydrogen and other elements
|
hydrobromic_acid
|
an aqueous solution of hydrogen bromide that is a strong liquid acid
|
hydrobromic_acid: an aqueous solution of hydrogen bromide that is a strong liquid acid
|
hydrocarbon
|
an organic compound containing only carbon and hydrogen
|
hydrocarbon: an organic compound containing only carbon and hydrogen
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bitumen
|
any of various naturally occurring impure mixtures of hydrocarbons
|
bitumen: any of various naturally occurring impure mixtures of hydrocarbons
|
pitch
|
any of various dark heavy viscid substances obtained as a residue
|
pitch: any of various dark heavy viscid substances obtained as a residue
|
coal_tar
|
a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds
|
coal_tar: a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds
|
butadiene
|
a gaseous hydrocarbon C4H6; used in making synthetic rubbers
|
butadiene: a gaseous hydrocarbon C4H6; used in making synthetic rubbers
|
chloroprene
|
derivative of butadiene used in making neoprene by polymerization
|
chloroprene: derivative of butadiene used in making neoprene by polymerization
|
hydrochloric_acid
|
an aqueous solution of hydrogen chloride; a strongly corrosive acid
|
hydrochloric_acid: an aqueous solution of hydrogen chloride; a strongly corrosive acid
|
hydrofluorocarbon
|
a fluorocarbon emitted as a by-product of industrial manufacturing
|
hydrofluorocarbon: a fluorocarbon emitted as a by-product of industrial manufacturing
|
hydrogen_bromide
|
a colorless gas that yields hydrobromic acid in solution with water
|
hydrogen_bromide: a colorless gas that yields hydrobromic acid in solution with water
|
hydrogen_chloride
|
a colorless corrosive gas (HCl)
|
hydrogen_chloride: a colorless corrosive gas (HCl)
|
hydrogen_fluoride
|
a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid
|
hydrogen_fluoride: a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid
|
hydrofluoric_acid
|
a weak poisonous liquid acid; formed by solution of hydrogen fluoride in water
|
hydrofluoric_acid: a weak poisonous liquid acid; formed by solution of hydrogen fluoride in water
|
hydrogen_iodide
|
a colorless gas that yields hydroiodic acid in aqueous solution
|
hydrogen_iodide: a colorless gas that yields hydroiodic acid in aqueous solution
|
hydroiodic_acid
|
an acid formed by aqueous solution of hydrogen iodide
|
hydroiodic_acid: an acid formed by aqueous solution of hydrogen iodide
|
hydrogen_sulfide
|
a sulfide having the unpleasant smell of rotten eggs
|
hydrogen_sulfide: a sulfide having the unpleasant smell of rotten eggs
|
hyper-eutectoid_steel
|
a steel that contains more than 0.9% carbon
|
hyper-eutectoid_steel: a steel that contains more than 0.9% carbon
|
hypnagogue
|
an agent that induces drowsiness or sleep
|
hypnagogue: an agent that induces drowsiness or sleep
|
hypo
|
a compound used as a fixing agent in photographic developing
|
hypo: a compound used as a fixing agent in photographic developing
|
hypochlorous_acid
|
a weak unstable acid known only in solution and in its salts; used as a bleaching agent and as an oxidizing agent
|
hypochlorous_acid: a weak unstable acid known only in solution and in its salts; used as a bleaching agent and as an oxidizing agent
|
hypo-eutectoid_steel
|
a steel that contains less that 0.9% carbon
|
hypo-eutectoid_steel: a steel that contains less that 0.9% carbon
|
hypoglycemic_agent
|
any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus
|
hypoglycemic_agent: any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus
|
hydrazo_group
|
the bivalent group -HNNH- derived from hydrazine
|
hydrazo_group: the bivalent group -HNNH- derived from hydrazine
|
hydroxide
|
a chemical compound containing the hydroxyl group
|
hydroxide: a chemical compound containing the hydroxyl group
|
hydroxyl
|
the monovalent group -OH in such compounds as bases and some acids and alcohols
|
hydroxyl: the monovalent group -OH in such compounds as bases and some acids and alcohols
|
hydroxide_ion
|
the anion OH having one oxygen and one hydrogen atom
|
hydroxide_ion: the anion OH having one oxygen and one hydrogen atom
|
hydroxymethyl
|
a methyl with hydroxide replacing the hydrogen atoms
|
hydroxymethyl: a methyl with hydroxide replacing the hydrogen atoms
|
ice
|
water frozen in the solid state
|
ice: water frozen in the solid state
|
black_ice
|
a thin coating of ice (as from freezing mist) on a road or sidewalk; nearly invisible but very hazardous
|
black_ice: a thin coating of ice (as from freezing mist) on a road or sidewalk; nearly invisible but very hazardous
|
frost
|
ice crystals forming a white deposit (especially on objects outside)
|
frost: ice crystals forming a white deposit (especially on objects outside)
|
hailstone
|
small pellet of ice that falls during a hailstorm
|
hailstone: small pellet of ice that falls during a hailstorm
|
icicle
|
ice resembling a pendent spear, formed by the freezing of dripping water
|
icicle: ice resembling a pendent spear, formed by the freezing of dripping water
|
Iceland_spar
|
a transparent calcite found in Iceland and used in polarizing microscopes
|
Iceland_spar: a transparent calcite found in Iceland and used in polarizing microscopes
|
identification_particle
|
a tiny particle of material that can be added to a product to indicate the source of manufacture
|
identification_particle: a tiny particle of material that can be added to a product to indicate the source of manufacture
|
Inconel
|
a nickel-base alloy with chromium and iron; used in gas-turbine blades
|
Inconel: a nickel-base alloy with chromium and iron; used in gas-turbine blades
|
ideal_gas
|
a hypothetical gas with molecules of negligible size that exert no intermolecular forces
|
ideal_gas: a hypothetical gas with molecules of negligible size that exert no intermolecular forces
|
imidazole
|
an organic base C3H4N2; a histamine inhibitor
|
imidazole: an organic base C3H4N2; a histamine inhibitor
|
impregnation
|
material with which something is impregnated
|
impregnation: material with which something is impregnated
|
indelible_ink
|
ink that cannot be erased or washed away
|
indelible_ink: ink that cannot be erased or washed away
|
India_ink
|
a black liquid ink used for printing or writing or drawing
|
India_ink: a black liquid ink used for printing or writing or drawing
|
indicator
|
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
|
indicator: (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
|
indurated_clay
|
hardened clay
|
indurated_clay: hardened clay
|
ink
|
a liquid used for printing or writing or drawing
|
ink: a liquid used for printing or writing or drawing
|
magnetic_ink
|
an ink that contains particles of a magnetic substance whose presence can be detected by magnetic sensors
|
magnetic_ink: an ink that contains particles of a magnetic substance whose presence can be detected by magnetic sensors
|
printer's_ink
|
a semisolid quick drying ink made especially for use in printing
|
printer's_ink: a semisolid quick drying ink made especially for use in printing
|
writing_ink
|
any permanent or washable ink used with pens
|
writing_ink: any permanent or washable ink used with pens
|
Indian_red
|
a red soil containing ferric oxide; often used as a pigment
|
Indian_red: a red soil containing ferric oxide; often used as a pigment
|
Indian_red
|
a red pigment composed in part from ferric oxide which is often used in paints and cosmetics
|
Indian_red: a red pigment composed in part from ferric oxide which is often used in paints and cosmetics
|
indoleacetic_acid
|
a plant hormone promoting elongation of stems and roots
|
indoleacetic_acid: a plant hormone promoting elongation of stems and roots
|
indolebutyric_acid
|
a synthetic plant hormone promoting elongation of stems and roots
|
indolebutyric_acid: a synthetic plant hormone promoting elongation of stems and roots
|
inducer
|
an agent capable of activating specific genes
|
inducer: an agent capable of activating specific genes
|
ivory_black
|
a black pigment made from grinding burnt ivory in oil
|
ivory_black: a black pigment made from grinding burnt ivory in oil
|
incense
|
a substance that produces a fragrant odor when burned
|
incense: a substance that produces a fragrant odor when burned
|
inhalant
|
something that is inhaled
|
inhalant: something that is inhaled
|
inoculant
|
a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease
|
inoculant: a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease
|
inorganic_compound
|
any compound that does not contain carbon
|
inorganic_compound: any compound that does not contain carbon
|
inosine
|
a nucleoside that is formed by the deamination of adenosine; used in kidney transplantation to provide a temporary source of sugar
|
inosine: a nucleoside that is formed by the deamination of adenosine; used in kidney transplantation to provide a temporary source of sugar
|
inositol
|
an optically inactive alcohol that is a component of the vitamin B complex
|
inositol: an optically inactive alcohol that is a component of the vitamin B complex
|
insecticide
|
a chemical used to kill insects
|
insecticide: a chemical used to kill insects
|
insectifuge
|
a chemical substance that repels insects
|
insectifuge: a chemical substance that repels insects
|
repellent
|
a chemical substance that repels animals
|
repellent: a chemical substance that repels animals
|
repellent
|
a compound with which fabrics are treated to repel water
|
repellent: a compound with which fabrics are treated to repel water
|
instillation
|
a liquid that is instilled drop by drop
|
instillation: a liquid that is instilled drop by drop
|
insulating_material
|
a material that reduces or prevents the transmission of heat or sound or electricity
|
insulating_material: a material that reduces or prevents the transmission of heat or sound or electricity
|
interleukin
|
any of several lymphokines that promote macrophages and killer T cells and B cells and other components of the immune system
|
interleukin: any of several lymphokines that promote macrophages and killer T cells and B cells and other components of the immune system
|
intermediate
|
a substance formed during a chemical process before the desired product is obtained
|
intermediate: a substance formed during a chemical process before the desired product is obtained
|
Invar
|
an alloy of iron and nickel having a low coefficient of thermal expansion; used in tuning forks and measuring tapes and other instruments
|
Invar: an alloy of iron and nickel having a low coefficient of thermal expansion; used in tuning forks and measuring tapes and other instruments
|
invertase
|
an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose
|
invertase: an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose
|
invert_sugar
|
a mixture of equal parts of glucose and fructose resulting from the hydrolysis of sucrose; found naturally in fruits; sweeter than glucose
|
invert_sugar: a mixture of equal parts of glucose and fructose resulting from the hydrolysis of sucrose; found naturally in fruits; sweeter than glucose
|
Javelle_water
|
an aqueous solution of sodium hypochlorite
|
Javelle_water: an aqueous solution of sodium hypochlorite
|
fraction
|
a component of a mixture that has been separated by a fractional process
|
fraction: a component of a mixture that has been separated by a fractional process
|
iodic_acid
|
a soluble crystalline acid; used as a reagent and disinfectant
|
iodic_acid: a soluble crystalline acid; used as a reagent and disinfectant
|
iodide
|
a salt or ester of hydriodic acid
|
iodide: a salt or ester of hydriodic acid
|
iodocompound
|
a compound containing the covalent iodine radical
|
iodocompound: a compound containing the covalent iodine radical
|
thyroprotein
|
a preparation made from iodinated protein and having an action similar to thyroxine
|
thyroprotein: a preparation made from iodinated protein and having an action similar to thyroxine
|
thyroglobulin
|
an iodine containing protein that is obtained from the thyroid gland and exhibits the general properties of the globulins
|
thyroglobulin: an iodine containing protein that is obtained from the thyroid gland and exhibits the general properties of the globulins
|
iron_blue
|
any of various blue pigments
|
iron_blue: any of various blue pigments
|
iron_blue
|
slightly purplish or bluish dark grey
|
iron_blue: slightly purplish or bluish dark grey
|
Payne's_grey
|
any pigment that produces a greyish to dark greyish blue
|
Payne's_grey: any pigment that produces a greyish to dark greyish blue
|
iron_disulfide
|
a compound containing two atoms of sulfur combined with iron
|
iron_disulfide: a compound containing two atoms of sulfur combined with iron
|
iron_ore
|
an ore from which iron can be extracted
|
iron_ore: an ore from which iron can be extracted
|
iron_perchloride
|
a highly toxic chemical used to engrave metal plates and electronic circuits
|
iron_perchloride: a highly toxic chemical used to engrave metal plates and electronic circuits
|
isocyanate
|
a salt or ester of isocyanic acid
|
isocyanate: a salt or ester of isocyanic acid
|
isocyanic_acid
|
an acid known only in the form of its esters
|
isocyanic_acid: an acid known only in the form of its esters
|
isoleucine
|
an essential amino acid found in proteins; isomeric with leucine
|
isoleucine: an essential amino acid found in proteins; isomeric with leucine
|
isomer
|
a compound that exists in forms having different arrangements of atoms but the same molecular weight
|
isomer: a compound that exists in forms having different arrangements of atoms but the same molecular weight
|
isomerase
|
an enzyme that catalyzes its substrate to an isomeric form
|
isomerase: an enzyme that catalyzes its substrate to an isomeric form
|
itaconic_acid
|
a crystalline carboxylic acid; occurs in some fermentations of sugars
|
itaconic_acid: a crystalline carboxylic acid; occurs in some fermentations of sugars
|
jade
|
a semiprecious gemstone that takes a high polish; is usually green but sometimes whitish; consists of jadeite or nephrite
|
jade: a semiprecious gemstone that takes a high polish; is usually green but sometimes whitish; consists of jadeite or nephrite
|
Japan_wax
|
a yellow wax obtained from sumac berries; used in polishes
|
Japan_wax: a yellow wax obtained from sumac berries; used in polishes
|
jargoon
|
a colorless (or pale yellow or smoky) variety of zircon
|
jargoon: a colorless (or pale yellow or smoky) variety of zircon
|
jasper
|
an opaque form of quartz; red or yellow or brown or dark green in color; used for ornamentation or as a gemstone
|
jasper: an opaque form of quartz; red or yellow or brown or dark green in color; used for ornamentation or as a gemstone
|
jelly
|
any substance having the consistency of jelly or gelatin
|
jelly: any substance having the consistency of jelly or gelatin
|
jet
|
a hard black form of lignite that takes a brilliant polish and is used in jewelry or ornamentation
|
jet: a hard black form of lignite that takes a brilliant polish and is used in jewelry or ornamentation
|
joss_stick
|
a slender stick of incense burned before a joss by the Chinese
|
joss_stick: a slender stick of incense burned before a joss by the Chinese
|
jute
|
a plant fiber used in making rope or sacks
|
jute: a plant fiber used in making rope or sacks
|
kapok
|
a plant fiber from the kapok tree; used for stuffing and insulation
|
kapok: a plant fiber from the kapok tree; used for stuffing and insulation
|
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