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blacktop
a black bituminous material used for paving roads or other areas; usually spread over crushed rock
blacktop: a black bituminous material used for paving roads or other areas; usually spread over crushed rock
macadam
broken stone used in macadamized roadways
macadam: broken stone used in macadamized roadways
tarmacadam
a paving material of tar and broken stone; mixed in a factory and shaped during paving
tarmacadam: a paving material of tar and broken stone; mixed in a factory and shaped during paving
parget
plaster used to coat outer walls and line chimneys
parget: plaster used to coat outer walls and line chimneys
paving
material used to pave an area
paving: material used to pave an area
pay_dirt
ore that yields a substantial profit to the miner
pay_dirt: ore that yields a substantial profit to the miner
pearlite
a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron
pearlite: a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron
pectic_acid
a complex acid that occurs in ripe fruit and some vegetables
pectic_acid: a complex acid that occurs in ripe fruit and some vegetables
pectin
any of various water-soluble colloidal carbohydrates that occur in ripe fruit and vegetables; used in making fruit jellies and jams
pectin: any of various water-soluble colloidal carbohydrates that occur in ripe fruit and vegetables; used in making fruit jellies and jams
pediculicide
a chemical agent that kills lice
pediculicide: a chemical agent that kills lice
penicillinase
enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic
penicillinase: enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic
pepsin
an enzyme produced in the stomach that splits proteins into peptones
pepsin: an enzyme produced in the stomach that splits proteins into peptones
pepsinogen
precursor of pepsin; stored in the stomach walls and converted to pepsin by hydrochloric acid in the stomach
pepsinogen: precursor of pepsin; stored in the stomach walls and converted to pepsin by hydrochloric acid in the stomach
perboric_acid
a form of boric acid
perboric_acid: a form of boric acid
perfluorocarbon
a powerful greenhouse gas emitted during the production of aluminum
perfluorocarbon: a powerful greenhouse gas emitted during the production of aluminum
Permalloy
an 80/20 alloy of nickel and iron; easily magnetized and demagnetized
Permalloy: an 80/20 alloy of nickel and iron; easily magnetized and demagnetized
permanganate
a dark purple salt of permanganic acid; in water solution it is used as a disinfectant and antiseptic
permanganate: a dark purple salt of permanganic acid; in water solution it is used as a disinfectant and antiseptic
permanganic_acid
an unstable purple acid (HMnO4) known only in solution or of permanganate salts
permanganic_acid: an unstable purple acid (HMnO4) known only in solution or of permanganate salts
peroxidase
any of a group of enzymes (occurring especially in plant cells) that catalyze the oxidation of a compound by a peroxide
peroxidase: any of a group of enzymes (occurring especially in plant cells) that catalyze the oxidation of a compound by a peroxide
peridot
a pale green variety of chrysolite; used as a gemstone
peridot: a pale green variety of chrysolite; used as a gemstone
peroxide
an inorganic compound containing the divalent ion -O-O-
peroxide: an inorganic compound containing the divalent ion -O-O-
pesticide
a chemical used to kill pests (as rodents or insects)
pesticide: a chemical used to kill pests (as rodents or insects)
petrochemical
any compound obtained from petroleum or natural gas
petrochemical: any compound obtained from petroleum or natural gas
petroleum
a dark oil consisting mainly of hydrocarbons
petroleum: a dark oil consisting mainly of hydrocarbons
residual_oil
oil products that remain after petroleum has been distilled
residual_oil: oil products that remain after petroleum has been distilled
petrolatum
a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication
petrolatum: a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication
system
(physical chemistry) a sample of matter in which substances in different phases are in equilibrium
system: (physical chemistry) a sample of matter in which substances in different phases are in equilibrium
phenolic_plastic
a plastic consisting of phenolic resins
phenolic_plastic: a plastic consisting of phenolic resins
phenylalanine
an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body
phenylalanine: an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body
phosgene
a colorless poisonous gas that smells like new-mown hay; used in chemical warfare
phosgene: a colorless poisonous gas that smells like new-mown hay; used in chemical warfare
phosphatase
any of a group of enzymes that act as a catalyst in the hydrolysis of organic phosphates
phosphatase: any of a group of enzymes that act as a catalyst in the hydrolysis of organic phosphates
phosphine
a colorless gas with a strong fishy smell; used as a pesticide
phosphine: a colorless gas with a strong fishy smell; used as a pesticide
phosphate
a salt of phosphoric acid
phosphate: a salt of phosphoric acid
phosphocreatine
an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction
phosphocreatine: an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction
phospholipid
any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membranes
phospholipid: any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membranes
phosphoric_acid
an acid used in fertilizers and soaps: H3PO4
phosphoric_acid: an acid used in fertilizers and soaps: H3PO4
phthalic_acid
a colorless acid used to make dyes and perfumes
phthalic_acid: a colorless acid used to make dyes and perfumes
phytochemical
a chemical substance obtained from plants that is biologically active but not nutritive
phytochemical: a chemical substance obtained from plants that is biologically active but not nutritive
picric_acid
a yellow toxic highly explosive strong acid; used in high explosives and as a dye and in chemical reactions
picric_acid: a yellow toxic highly explosive strong acid; used in high explosives and as a dye and in chemical reactions
pig_iron
crude iron tapped from a blast furnace
pig_iron: crude iron tapped from a blast furnace
pig_lead
lead that is cast in pigs
pig_lead: lead that is cast in pigs
plasmin
an enzyme that dissolves the fibrin of blood clots
plasmin: an enzyme that dissolves the fibrin of blood clots
plasminogen
an inactive form of plasmin that occurs in plasma and is converted to plasmin by organic solvents
plasminogen: an inactive form of plasmin that occurs in plasma and is converted to plasmin by organic solvents
plasminogen_activator
protease produced in the kidney that converts plasminogen to plasmin and so initiates fibrinolysis
plasminogen_activator: protease produced in the kidney that converts plasminogen to plasmin and so initiates fibrinolysis
platinum_black
a fine black powder of platinum; used as a catalyst in chemical reactions
platinum_black: a fine black powder of platinum; used as a catalyst in chemical reactions
polymerase
an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA
polymerase: an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA
DNA_polymerase
the enzyme responsible for DNA replication
DNA_polymerase: the enzyme responsible for DNA replication
transcriptase
the enzyme that copies DNA into RNA
transcriptase: the enzyme that copies DNA into RNA
reverse_transcriptase
a polymerase that catalyzes the formation of DNA using RNA as a template; found especially in retroviruses
reverse_transcriptase: a polymerase that catalyzes the formation of DNA using RNA as a template; found especially in retroviruses
coloring_material
any material used for its color
coloring_material: any material used for its color
dye
a usually soluble substance for staining or coloring e.g. fabrics or hair
dye: a usually soluble substance for staining or coloring e.g. fabrics or hair
tincture
a substances that colors metals
tincture: a substances that colors metals
argent
a metal tincture used in heraldry to give a silvery appearance
argent: a metal tincture used in heraldry to give a silvery appearance
alizarin
an orange-red crystalline compound used in making red pigments and in dyeing
alizarin: an orange-red crystalline compound used in making red pigments and in dyeing
alizarin_carmine
any of various acid dyes; used for dyeing wool scarlet red
alizarin_carmine: any of various acid dyes; used for dyeing wool scarlet red
bluing
used to whiten laundry or hair or give it a bluish tinge
bluing: used to whiten laundry or hair or give it a bluish tinge
bromophenol_blue
a dye used as an acid-base indicator
bromophenol_blue: a dye used as an acid-base indicator
bromothymol_blue
a dye used as an acid-base indicator
bromothymol_blue: a dye used as an acid-base indicator
cochineal
a red dyestuff consisting of dried bodies of female cochineal insects
cochineal: a red dyestuff consisting of dried bodies of female cochineal insects
cyanine_dye
any of a class of dyes containing a -CH= group linking two heterocyclic rings containing nitrogen; used as sensitizers in photography
cyanine_dye: any of a class of dyes containing a -CH= group linking two heterocyclic rings containing nitrogen; used as sensitizers in photography
direct_dye
dye with a high affinity for cellulose fibers (cotton or rayon etc.)
direct_dye: dye with a high affinity for cellulose fibers (cotton or rayon etc.)
eosin
a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
eosin: a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
fluorescein
a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
fluorescein: a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
fluorescein_isothiocyanate
a fluorochrome commonly conjugated with antibodies for use in indirect immunofluorescence
fluorescein_isothiocyanate: a fluorochrome commonly conjugated with antibodies for use in indirect immunofluorescence
fluorochrome
any of various fluorescent substances used in fluorescence microscopy to stain specimens
fluorochrome: any of various fluorescent substances used in fluorescence microscopy to stain specimens
hair_dye
a dye or tint for the hair
hair_dye: a dye or tint for the hair
hematochrome
a reddish coloring material found in some algae
hematochrome: a reddish coloring material found in some algae
henna
a reddish brown dye used especially on hair
henna: a reddish brown dye used especially on hair
rinse
a liquid preparation used on wet hair to give it a tint
rinse: a liquid preparation used on wet hair to give it a tint
Kendal_green
a green dye, often used to color cloth, which is obtained from the woad plant
Kendal_green: a green dye, often used to color cloth, which is obtained from the woad plant
lac_dye
scarlet dye like cochineal; extracted with alkali from stick lac
lac_dye: scarlet dye like cochineal; extracted with alkali from stick lac
lead_acetate
a poisonous white solid (Pb[CH3CO]2) used in dyeing cotton and in making enamels and varnishes
lead_acetate: a poisonous white solid (Pb[CH3CO]2) used in dyeing cotton and in making enamels and varnishes
orchil
a purplish dye obtained from orchil lichens
orchil: a purplish dye obtained from orchil lichens
phenol
any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups
phenol: any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups
pigment
dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)
pigment: dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)
pigment
any substance whose presence in plant or animal tissues produces a characteristic color
pigment: any substance whose presence in plant or animal tissues produces a characteristic color
bole
a soft oily clay used as a pigment (especially a reddish brown pigment)
bole: a soft oily clay used as a pigment (especially a reddish brown pigment)
lake
any of numerous bright translucent organic pigments
lake: any of numerous bright translucent organic pigments
lake
a purplish red pigment prepared from lac or cochineal
lake: a purplish red pigment prepared from lac or cochineal
orange
any pigment producing the orange color
orange: any pigment producing the orange color
watercolor
water-soluble pigment
watercolor: water-soluble pigment
pine_tar
a dark viscous substance obtained from the destructive distillation of pine wood
pine_tar: a dark viscous substance obtained from the destructive distillation of pine wood
pisang_wax
a wax obtained from the leaves of a plantain
pisang_wax: a wax obtained from the leaves of a plantain
plant_material
material derived from plants
plant_material: material derived from plants
plant_product
a product made from plant material
plant_product: a product made from plant material
plasma
a green slightly translucent variety of chalcedony used as a gemstone
plasma: a green slightly translucent variety of chalcedony used as a gemstone
plaster
a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings
plaster: a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings
plaster_of_Paris
any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs
plaster_of_Paris: any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs
puddle
a mixture of wet clay and sand that can be used to line a pond and that is impervious to water when dry
puddle: a mixture of wet clay and sand that can be used to line a pond and that is impervious to water when dry
podzol
a soil that develops in temperate to cold moist climates under coniferous or heath vegetation; an organic mat over a grey leached layer
podzol: a soil that develops in temperate to cold moist climates under coniferous or heath vegetation; an organic mat over a grey leached layer
poison_gas
a gas that is poisonous to breath or contact; used in chemical warfare
poison_gas: a gas that is poisonous to breath or contact; used in chemical warfare
polyester
a complex ester used for making fibers or resins or plastics or as a plasticizer
polyester: a complex ester used for making fibers or resins or plastics or as a plasticizer
polyester
any of numerous synthetic resins; they are light and strong and weather resistant
polyester: any of numerous synthetic resins; they are light and strong and weather resistant
polyester_fiber
a quick-drying resilient synthetic fiber consisting primarily of polyester
polyester_fiber: a quick-drying resilient synthetic fiber consisting primarily of polyester
polysaccharide
any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules
polysaccharide: any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules
polymer
a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers
polymer: a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers
polyphosphate
a salt or ester of polyphosphoric acid
polyphosphate: a salt or ester of polyphosphoric acid
polyunsaturated_fat
a class of fats having long carbon chains with many double bonds unsaturated with hydrogen atoms; used in some margarines; supposedly associated with low blood cholesterol
polyunsaturated_fat: a class of fats having long carbon chains with many double bonds unsaturated with hydrogen atoms; used in some margarines; supposedly associated with low blood cholesterol
potassium_ferrocyanide
a cyanide compound that is prepared by the reaction of potassium cyanide with ferrous salts; commonly used by gardeners
potassium_ferrocyanide: a cyanide compound that is prepared by the reaction of potassium cyanide with ferrous salts; commonly used by gardeners
potassium_permanganate
a poisonous salt that forms dark purple crystals and is purple-red when dissolved in water; used as an oxidizing and bleaching agent and as a disinfectant and antiseptic
potassium_permanganate: a poisonous salt that forms dark purple crystals and is purple-red when dissolved in water; used as an oxidizing and bleaching agent and as a disinfectant and antiseptic