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sandstone
a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)
sandstone: a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)
bluestone
bluish-grey sandstone used for paving and building
bluestone: bluish-grey sandstone used for paving and building
greensand
an olive-green sandstone containing glauconite
greensand: an olive-green sandstone containing glauconite
polish
a preparation used in polishing
polish: a preparation used in polishing
polypropylene
a polymer of propylene used as a thermoplastic molding material
polypropylene: a polymer of propylene used as a thermoplastic molding material
polyvinyl-formaldehyde
a polymer of vinyl formaldehyde
polyvinyl-formaldehyde: a polymer of vinyl formaldehyde
porphyry
any igneous rock with crystals embedded in a finer groundmass of minerals
porphyry: any igneous rock with crystals embedded in a finer groundmass of minerals
porpoise_oil
a yellow fatty oil obtained from porpoises and used as a fine lubricant
porpoise_oil: a yellow fatty oil obtained from porpoises and used as a fine lubricant
dolphin_oil
an unsaturated fatty oil obtained from dolphins and used as a fine lubricant
dolphin_oil: an unsaturated fatty oil obtained from dolphins and used as a fine lubricant
potash
a potassium compound often used in agriculture and industry
potash: a potassium compound often used in agriculture and industry
powder
a solid substance in the form of tiny loose particles; a solid that has been pulverized
powder: a solid substance in the form of tiny loose particles; a solid that has been pulverized
prairie_soil
a type of soil occurring under grasses in temperate climates
prairie_soil: a type of soil occurring under grasses in temperate climates
precipitant
an agent that causes a precipitate to form
precipitant: an agent that causes a precipitate to form
preservative
a chemical compound that is added to protect against decay or decomposition
preservative: a chemical compound that is added to protect against decay or decomposition
product
a chemical substance formed as a result of a chemical reaction
product: a chemical substance formed as a result of a chemical reaction
percolate
the product of percolation
percolate: the product of percolation
propanal
a colorless liquid aldehyde
propanal: a colorless liquid aldehyde
propanol
a clear colorless volatile liquid (alcohol) used as a solvent and antiseptic
propanol: a clear colorless volatile liquid (alcohol) used as a solvent and antiseptic
propenal
a pungent colorless unsaturated liquid aldehyde made from propene
propenal: a pungent colorless unsaturated liquid aldehyde made from propene
propenoate
a salt or ester of propenoic acid
propenoate: a salt or ester of propenoic acid
propenoic_acid
an unsaturated liquid carboxylic acid used in the manufacture of acrylic resins
propenoic_acid: an unsaturated liquid carboxylic acid used in the manufacture of acrylic resins
propenonitrile
a colorless liquid unsaturated nitrile made from propene
propenonitrile: a colorless liquid unsaturated nitrile made from propene
propylene
a flammable gas obtained by cracking petroleum; used in organic synthesis
propylene: a flammable gas obtained by cracking petroleum; used in organic synthesis
propyl
the monovalent organic group C3H7- obtained from propane
propyl: the monovalent organic group C3H7- obtained from propane
protease
any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis
protease: any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis
ptomaine
any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria
ptomaine: any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria
Pyrex
a borosilicate glass with a low coefficient of expansion; used for heat-resistant glassware in cooking and chemistry
Pyrex: a borosilicate glass with a low coefficient of expansion; used for heat-resistant glassware in cooking and chemistry
pyrimidine
a heterocyclic organic compound with a penetrating odor
pyrimidine: a heterocyclic organic compound with a penetrating odor
pyrimidine
any of several basic compounds derived from pyrimidine
pyrimidine: any of several basic compounds derived from pyrimidine
pyrope
a deep red garnet used as a gemstone
pyrope: a deep red garnet used as a gemstone
pyrophoric_alloy
an alloy that emits sparks when struck or scratched with steel; used in lighter flints
pyrophoric_alloy: an alloy that emits sparks when struck or scratched with steel; used in lighter flints
pyruvic_acid
a colorless acid formed as an important intermediate in metabolism or fermentation
pyruvic_acid: a colorless acid formed as an important intermediate in metabolism or fermentation
quassia
a bitter compound used as an insecticide and tonic and vermifuge; extracted from the wood and bark of trees of the genera Quassia and Picrasma
quassia: a bitter compound used as an insecticide and tonic and vermifuge; extracted from the wood and bark of trees of the genera Quassia and Picrasma
quenched_steel
steel that has been hardened by immersing it in water or oil to cool it
quenched_steel: steel that has been hardened by immersing it in water or oil to cool it
quercitron
a yellow dye made from the bark of the quercitron oak tree
quercitron: a yellow dye made from the bark of the quercitron oak tree
quinone
any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
quinone: any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
radiopaque_dye
dye that does not allow the passage of X rays or other radiation; used to outline certain organs during X-ray examination
radiopaque_dye: dye that does not allow the passage of X rays or other radiation; used to outline certain organs during X-ray examination
rhodolite
a red or pink variety of garnet used as a gemstone
rhodolite: a red or pink variety of garnet used as a gemstone
safranine
any of a class of chiefly red organic dyes
safranine: any of a class of chiefly red organic dyes
pheno-safranine
a purplish red water-soluble dye used in microscopy
pheno-safranine: a purplish red water-soluble dye used in microscopy
Tyrian_purple
a red-purple to deep purple dye obtained from snails or made synthetically
Tyrian_purple: a red-purple to deep purple dye obtained from snails or made synthetically
vat_dye
a water-insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material; used for dyeing cotton
vat_dye: a water-insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material; used for dyeing cotton
woad
a blue dyestuff obtained from the woad plant
woad: a blue dyestuff obtained from the woad plant
radioactive_material
material that is radioactive
radioactive_material: material that is radioactive
radioactive_waste
useless radioactive materials that are left after some laboratory or commercial process is completed
radioactive_waste: useless radioactive materials that are left after some laboratory or commercial process is completed
raffia
leaf fibers of the raffia palm tree; used to make baskets and mats etc.
raffia: leaf fibers of the raffia palm tree; used to make baskets and mats etc.
raffinose
a trisaccharide that occurs in sugar beets and cotton seeds and certain cereals
raffinose: a trisaccharide that occurs in sugar beets and cotton seeds and certain cereals
rauwolfia
any of several alkaloids extracted from the shrub Rauwolfia serpentina
rauwolfia: any of several alkaloids extracted from the shrub Rauwolfia serpentina
raveling
a bit of fiber that has become separated from woven fabric
raveling: a bit of fiber that has become separated from woven fabric
red_brass
brass with enough copper to give it a reddish tint; used for plumbing pipe and other brass hardware and in cheap jewelry
red_brass: brass with enough copper to give it a reddish tint; used for plumbing pipe and other brass hardware and in cheap jewelry
red_lead
a reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramics
red_lead: a reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramics
red_tide
seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin
red_tide: seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin
reductase
an enzyme that catalyses the biochemical reduction of some specified substance
reductase: an enzyme that catalyses the biochemical reduction of some specified substance
refrigerant
any substance used to provide cooling (as in a refrigerator)
refrigerant: any substance used to provide cooling (as in a refrigerator)
remover
a solvent that removes a substance (usually from a surface)
remover: a solvent that removes a substance (usually from a surface)
renin
a proteolytic enzyme secreted by the kidneys; catalyzes the formation of angiotensin and thus affects blood pressure
renin: a proteolytic enzyme secreted by the kidneys; catalyzes the formation of angiotensin and thus affects blood pressure
rennin
an enzyme that occurs in gastric juice; causes milk to coagulate
rennin: an enzyme that occurs in gastric juice; causes milk to coagulate
residue
matter that remains after something has been removed
residue: matter that remains after something has been removed
resorcinol
a crystalline phenol obtained from various resins; used in ointments for acne and in dandruff shampoos
resorcinol: a crystalline phenol obtained from various resins; used in ointments for acne and in dandruff shampoos
restrainer
a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
restrainer: a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
restriction_endonuclease
any of the enzymes that cut nucleic acid at specific restriction sites and produce restriction fragments; obtained from bacteria (where they cripple viral invaders); used in recombinant DNA technology
restriction_endonuclease: any of the enzymes that cut nucleic acid at specific restriction sites and produce restriction fragments; obtained from bacteria (where they cripple viral invaders); used in recombinant DNA technology
retinene
either of two yellow to red retinal pigments formed from rhodopsin by the action of light
retinene: either of two yellow to red retinal pigments formed from rhodopsin by the action of light
ridge_tile
a decorative tile that is bent in cross section; used to cover the ridge of a roof
ridge_tile: a decorative tile that is bent in cross section; used to cover the ridge of a roof
roofing_material
building material used in constructing roofs
roofing_material: building material used in constructing roofs
rose_quartz
a translucent rose-red variety of quartz used for ornaments
rose_quartz: a translucent rose-red variety of quartz used for ornaments
roughcast
a coarse plaster for the surface of external walls
roughcast: a coarse plaster for the surface of external walls
latex
a milky exudate from certain plants that coagulates on exposure to air
latex: a milky exudate from certain plants that coagulates on exposure to air
rubber
an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
rubber: an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
crepe_rubber
crude natural rubber; used mainly for shoe soles
crepe_rubber: crude natural rubber; used mainly for shoe soles
rubber
any of various synthetic elastic materials whose properties resemble natural rubber
rubber: any of various synthetic elastic materials whose properties resemble natural rubber
silicone_rubber
made from silicone elastomers; retains flexibility resilience and tensile strength over a wide temperature range
silicone_rubber: made from silicone elastomers; retains flexibility resilience and tensile strength over a wide temperature range
cold_rubber
a rubber made at low temperatures (5 degrees Centigrade) which is tougher than conventional rubber and is often used in car tires
cold_rubber: a rubber made at low temperatures (5 degrees Centigrade) which is tougher than conventional rubber and is often used in car tires
neoprene
a synthetic rubber that is resistant to oils and aging; used in waterproof products
neoprene: a synthetic rubber that is resistant to oils and aging; used in waterproof products
hard_rubber
a hard nonresilient rubber formed by vulcanizing natural rubber
hard_rubber: a hard nonresilient rubber formed by vulcanizing natural rubber
Para_rubber
a type of natural rubber obtained from tropical South American trees
Para_rubber: a type of natural rubber obtained from tropical South American trees
buna
made by polymerizing butadiene
buna: made by polymerizing butadiene
butyl_rubber
synthetic rubber made by polymerizing isobutylene
butyl_rubber: synthetic rubber made by polymerizing isobutylene
butyl
a hydrocarbon radical (C4H9)
butyl: a hydrocarbon radical (C4H9)
ruby
a transparent deep red variety of corundum; used as a gemstone and in lasers
ruby: a transparent deep red variety of corundum; used as a gemstone and in lasers
ruddle
a red iron ore used in dyeing and marking
ruddle: a red iron ore used in dyeing and marking
rutile
a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium
rutile: a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium
rain
drops of fresh water that fall as precipitation from clouds
rain: drops of fresh water that fall as precipitation from clouds
condensate
a product of condensation
condensate: a product of condensation
seawater
water containing salts
seawater: water containing salts
evaporite
the sediment that is left after the evaporation of seawater
evaporite: the sediment that is left after the evaporation of seawater
fresh_water
water that is not salty
fresh_water: water that is not salty
Rochelle_salt
a double salt used in Seidlitz powder; acts as a cathartic
Rochelle_salt: a double salt used in Seidlitz powder; acts as a cathartic
Seidlitz_powder
an effervescing salt containing sodium bicarbonate and Rochelle salt and tartaric acid; used as a cathartic
Seidlitz_powder: an effervescing salt containing sodium bicarbonate and Rochelle salt and tartaric acid; used as a cathartic
salicylate
a salt of salicylic acid (included in several commonly used drugs)
salicylate: a salt of salicylic acid (included in several commonly used drugs)
salicylic_acid
a white crystalline substance with a bitter aftertaste; used as a fungicide or in making aspirin or dyes or perfumes
salicylic_acid: a white crystalline substance with a bitter aftertaste; used as a fungicide or in making aspirin or dyes or perfumes
salmon_oil
a fatty oil obtained from the wastes in canning salmon; used in making soap and dressing leather
salmon_oil: a fatty oil obtained from the wastes in canning salmon; used in making soap and dressing leather
salol
a white powder with a pleasant taste and odor; used to absorb light in sun tan lotions or as a preservative or an antiseptic or a coating for pills in which the medicine is intended for enteric release
salol: a white powder with a pleasant taste and odor; used to absorb light in sun tan lotions or as a preservative or an antiseptic or a coating for pills in which the medicine is intended for enteric release
salt
a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
salt: a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
double_salt
a solution of two simple salts that forms a single substance on crystallization
double_salt: a solution of two simple salts that forms a single substance on crystallization
parathion
a colorless and odorless toxic oil used as an insecticide
parathion: a colorless and odorless toxic oil used as an insecticide
Paris_green
a toxic double salt of copper arsenate and copper acetate
Paris_green: a toxic double salt of copper arsenate and copper acetate
rotenone
a white crystalline insecticide that has low toxicity for mammals; is used in home gardens; extracted from the roots of derris and cube
rotenone: a white crystalline insecticide that has low toxicity for mammals; is used in home gardens; extracted from the roots of derris and cube
samarskite
a complex black mineral occurring in pegmatites
samarskite: a complex black mineral occurring in pegmatites
sapphirine
a rare light blue or green mineral; consists of aluminum and magnesium silicate and occurs as small grains in some metamorphic rocks
sapphirine: a rare light blue or green mineral; consists of aluminum and magnesium silicate and occurs as small grains in some metamorphic rocks
bile_salt
a salt of bile acid and a base; functions as an emulsifier of lipids and fatty acids
bile_salt: a salt of bile acid and a base; functions as an emulsifier of lipids and fatty acids