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olivenite
rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits
olivenite: rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits
ozonide
any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound
ozonide: any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound
perchlorate
a salt of perchloric acid
perchlorate: a salt of perchloric acid
perchloric_acid
a powerful oxidizing agent; forms perchlorates
perchloric_acid: a powerful oxidizing agent; forms perchlorates
proline
an amino acid that is found in many proteins (especially collagen)
proline: an amino acid that is found in many proteins (especially collagen)
biomass
plant materials and animal waste used as fuel
biomass: plant materials and animal waste used as fuel
butane
occurs in natural gas; used in the manufacture of rubber and fuels
butane: occurs in natural gas; used in the manufacture of rubber and fuels
char
a charred substance
char: a charred substance
charcoal
a carbonaceous material obtained by heating wood or other organic matter in the absence of air
charcoal: a carbonaceous material obtained by heating wood or other organic matter in the absence of air
coal_gas
gaseous mixture produced by distillation of bituminous coal and used for heating and lighting
coal_gas: gaseous mixture produced by distillation of bituminous coal and used for heating and lighting
town_gas
coal gas manufactured for domestic and industrial use
town_gas: coal gas manufactured for domestic and industrial use
coke
carbon fuel produced by distillation of coal
coke: carbon fuel produced by distillation of coal
diesel_oil
a heavy mineral oil used as fuel in diesel engines
diesel_oil: a heavy mineral oil used as fuel in diesel engines
derv
diesel oil used in cars and lorries with diesel engines; from d(iesel) e(ngine) r(oad) v(ehicle)
derv: diesel oil used in cars and lorries with diesel engines; from d(iesel) e(ngine) r(oad) v(ehicle)
fire
fuel that is burning and is used as a means for cooking
fire: fuel that is burning and is used as a means for cooking
fossil_fuel
fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
fossil_fuel: fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
fuel_oil
a petroleum product used for fuel
fuel_oil: a petroleum product used for fuel
gasohol
a gasoline substitute consisting of 90% gasoline and 10% grain alcohol from corn
gasohol: a gasoline substitute consisting of 90% gasoline and 10% grain alcohol from corn
gasoline
a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
gasoline: a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
leaded_gasoline
gasoline treated with a lead compound to reduce motor knocks
leaded_gasoline: gasoline treated with a lead compound to reduce motor knocks
illuminant
something that can serve as a source of light
illuminant: something that can serve as a source of light
kerosene
a flammable hydrocarbon oil used as fuel in lamps and heaters
kerosene: a flammable hydrocarbon oil used as fuel in lamps and heaters
methanol
a light volatile flammable poisonous liquid alcohol; used as an antifreeze and solvent and fuel and as a denaturant for ethyl alcohol
methanol: a light volatile flammable poisonous liquid alcohol; used as an antifreeze and solvent and fuel and as a denaturant for ethyl alcohol
nuclear_fuel
fuel (such as uranium) that can be used in nuclear reactors as a source of electricity
nuclear_fuel: fuel (such as uranium) that can be used in nuclear reactors as a source of electricity
opal
a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
opal: a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
ore
a mineral that contains metal that is valuable enough to be mined
ore: a mineral that contains metal that is valuable enough to be mined
oroide
alloy of copper and tin and zinc; used in imitation gold jewelry
oroide: alloy of copper and tin and zinc; used in imitation gold jewelry
orpiment
a yellow mineral occurring in conjunction with realgar; an ore of arsenic
orpiment: a yellow mineral occurring in conjunction with realgar; an ore of arsenic
osmiridium
a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc.
osmiridium: a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc.
paragonite
a colorless or pale brown mica with sodium
paragonite: a colorless or pale brown mica with sodium
paraldehyde
a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent
paraldehyde: a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent
peat
partially carbonized vegetable matter saturated with water; can be used as a fuel when dried
peat: partially carbonized vegetable matter saturated with water; can be used as a fuel when dried
pentlandite
a mineral (iron and nickel sulphide) that is the chief ore of nickel
pentlandite: a mineral (iron and nickel sulphide) that is the chief ore of nickel
triose
any monosaccharide sugar containing three atoms of carbon per molecule
triose: any monosaccharide sugar containing three atoms of carbon per molecule
tetrose
any monosaccharide sugar containing four atoms of carbon per molecule
tetrose: any monosaccharide sugar containing four atoms of carbon per molecule
pentose
any monosaccharide sugar containing five atoms of carbon per molecule
pentose: any monosaccharide sugar containing five atoms of carbon per molecule
hexose
a monosaccharide that contains six carbon atoms per molecule
hexose: a monosaccharide that contains six carbon atoms per molecule
pentoxide
an oxide containing five atoms of oxygen in the molecule
pentoxide: an oxide containing five atoms of oxygen in the molecule
peptone
any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids
peptone: any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids
periclase
a white solid mineral that occurs naturally as periclase; a source of magnesium
periclase: a white solid mineral that occurs naturally as periclase; a source of magnesium
phlogopite
a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum
phlogopite: a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum
pinite
grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates
pinite: grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates
pollucite
a rare mineral that is an important source of cesium
pollucite: a rare mineral that is an important source of cesium
quaternary_ammonium_compound
a compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs
quaternary_ammonium_compound: a compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs
proenzyme
any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
proenzyme: any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
propane
colorless gas found in natural gas and petroleum; used as a fuel
propane: colorless gas found in natural gas and petroleum; used as a fuel
propellant
any substance that propels
propellant: any substance that propels
rocket_fuel
an explosive charge that propels a rocket
rocket_fuel: an explosive charge that propels a rocket
propylthiouracil
a crystalline compound used as an antithyroid drug in the treatment of goiter
propylthiouracil: a crystalline compound used as an antithyroid drug in the treatment of goiter
psilomelane
a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese
psilomelane: a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese
pyridine
a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
pyridine: a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
pyrite
a common mineral (iron disulfide) that has a pale yellow color
pyrite: a common mineral (iron disulfide) that has a pale yellow color
pyrites
any of various metallic-looking sulfides (of which pyrite is the commonest)
pyrites: any of various metallic-looking sulfides (of which pyrite is the commonest)
pyrolusite
a mineral consisting of manganese dioxide; an important source of manganese
pyrolusite: a mineral consisting of manganese dioxide; an important source of manganese
pyromorphite
a mineral consisting of lead chloride and phosphate; a minor source of lead
pyromorphite: a mineral consisting of lead chloride and phosphate; a minor source of lead
pyrophyllite
a white or greenish aluminum silicate mineral (resembles talc)
pyrophyllite: a white or greenish aluminum silicate mineral (resembles talc)
pyroxene
any of a group of crystalline silicate mineral common in igneous and metamorphic rocks
pyroxene: any of a group of crystalline silicate mineral common in igneous and metamorphic rocks
pyrrhotite
a brownish iron sulfide mineral (FeS) having weak magnetic properties
pyrrhotite: a brownish iron sulfide mineral (FeS) having weak magnetic properties
quartz
a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
quartz: a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
quartzite
hard metamorphic rock consisting essentially of interlocking quartz crystals
quartzite: hard metamorphic rock consisting essentially of interlocking quartz crystals
rock_crystal
a clear quartz used in making electronic and optical equipment
rock_crystal: a clear quartz used in making electronic and optical equipment
rhinestone
an imitation diamond made from rock crystal or glass or paste
rhinestone: an imitation diamond made from rock crystal or glass or paste
cairngorm
a smoky yellow or brown quartz
cairngorm: a smoky yellow or brown quartz
rag_paper
paper made partly or wholly from rags
rag_paper: paper made partly or wholly from rags
reactant
a chemical substance that is present at the start of a chemical reaction
reactant: a chemical substance that is present at the start of a chemical reaction
realgar
a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic
realgar: a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic
red_clay
clay whose redness results from iron oxide
red_clay: clay whose redness results from iron oxide
red_fire
combustible material (usually salts of lithium or strontium) that burns bright red; used in flares and fireworks
red_fire: combustible material (usually salts of lithium or strontium) that burns bright red; used in flares and fireworks
regosol
a type of soil consisting of unconsolidated material from freshly deposited alluvium or sand
regosol: a type of soil consisting of unconsolidated material from freshly deposited alluvium or sand
regur
a rich black loam of India
regur: a rich black loam of India
residual_soil
the soil that is remaining after the soluble elements have been dissolved
residual_soil: the soil that is remaining after the soluble elements have been dissolved
topsoil
the layer of soil on the surface
topsoil: the layer of soil on the surface
subsoil
the layer of soil between the topsoil and bedrock
subsoil: the layer of soil between the topsoil and bedrock
resinoid
a plastic containing resins
resinoid: a plastic containing resins
rhodochrosite
a mineral consisting of manganese carbonate; a source of manganese
rhodochrosite: a mineral consisting of manganese carbonate; a source of manganese
rhodonite
a pink or red mineral consisting of crystalline manganese silicate; used as an ornamental stone
rhodonite: a pink or red mineral consisting of crystalline manganese silicate; used as an ornamental stone
ribose
a pentose sugar important as a component of ribonucleic acid
ribose: a pentose sugar important as a component of ribonucleic acid
ricin
a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
ricin: a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
road_metal
broken rock used for repairing or making roads
road_metal: broken rock used for repairing or making roads
rock
material consisting of the aggregate of minerals like those making up the Earth's crust
rock: material consisting of the aggregate of minerals like those making up the Earth's crust
arenaceous_rock
a sedimentary rock composed of sand
arenaceous_rock: a sedimentary rock composed of sand
argillaceous_rock
a sedimentary rock formed from clay deposits
argillaceous_rock: a sedimentary rock formed from clay deposits
rudaceous_rock
a sedimentary rock formed of coarse-grained material
rudaceous_rock: a sedimentary rock formed of coarse-grained material
breccia
a rudaceous rock consisting of sharp fragments embedded in clay or sand
breccia: a rudaceous rock consisting of sharp fragments embedded in clay or sand
sedimentary_rock
rock formed from consolidated clay sediments
sedimentary_rock: rock formed from consolidated clay sediments
sial
the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum
sial: the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum
sima
rock that form the continuous lower layer of the earth's crust; rich in silicon and magnesium
sima: rock that form the continuous lower layer of the earth's crust; rich in silicon and magnesium
marlite
metamorphic rock with approximately the same composition as marl
marlite: metamorphic rock with approximately the same composition as marl
metamorphic_rock
rock altered by pressure and heat
metamorphic_rock: rock altered by pressure and heat
gravel
rock fragments and pebbles
gravel: rock fragments and pebbles
hornfels
a fine-grained metamorphic rock formed by the action of heat on clay rocks
hornfels: a fine-grained metamorphic rock formed by the action of heat on clay rocks
ballast
coarse gravel laid to form a bed for streets and railroads
ballast: coarse gravel laid to form a bed for streets and railroads
bank_gravel
gravel as found in natural deposits
bank_gravel: gravel as found in natural deposits
caliche
nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru
caliche: nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru
shingle
coarse beach gravel of small waterworn stones and pebbles (or a stretch of shore covered with such gravel)
shingle: coarse beach gravel of small waterworn stones and pebbles (or a stretch of shore covered with such gravel)
gem
a crystalline rock that can be cut and polished for jewelry
gem: a crystalline rock that can be cut and polished for jewelry
cabochon
a highly polished gem that is cut convexly but without facets
cabochon: a highly polished gem that is cut convexly but without facets
slate
a fine-grained metamorphic rock that can be split into thin layers
slate: a fine-grained metamorphic rock that can be split into thin layers
shingling
(geology) sediment in which flat pebbles are uniformly tilted in the same direction
shingling: (geology) sediment in which flat pebbles are uniformly tilted in the same direction
pumice
a light glass formed on the surface of some lavas; used as an abrasive
pumice: a light glass formed on the surface of some lavas; used as an abrasive