a silver-white metallic element of the platinum group that resembles platinum
phosphor
Noun
a synthetic substance that is fluorescent or phosphorescent
phosphorus
Noun
a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells
platinum
Noun
a heavy precious metallic element
plutonium
Noun
a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons
plutonium 239
Noun
a highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel
polonium
Noun
a radioactive metallic element that is similar to tellurium and bismuth
potassium
Noun
a light soft silver-white metallic element of the alkali metal group
praseodymium
Noun
a soft yellowish-white trivalent metallic element of the rare earth group
promethium
Noun
a soft silvery metallic element of the rare earth group having no stable isotope
porcelain clay
Noun
a fine usually white clay formed by the weathering of aluminous minerals (as feldspar)
perchlorate
Noun
a salt of perchloric acid
perchloric acid
Noun
a powerful oxidizing agent
proline
Noun
an amino acid that is found in many proteins (especially collagen)
petrol
Noun
a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum
paragonite
Noun
a colorless or pale brown mica with sodium
paraldehyde
Noun
a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent
peat
Noun
partially carbonized vegetable matter saturated with water
pentlandite
Noun
a mineral (iron and nickel sulphide) that is the chief ore of nickel
pentose
Noun
any monosaccharide sugar containing five atoms of carbon per molecule
pentoxide
Noun
an oxide containing five atoms of oxygen in the molecule
peptone
Noun
any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids
periclase
Noun
a white solid mineral that occurs naturally as periclase
phlogopite
Noun
a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum
pinite
Noun
grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates
pollucite
Noun
a rare mineral that is an important source of cesium
proenzyme
Noun
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
peacock ore
Noun
a mineral consisting of sulfides of copper and iron that is found in copper deposits
propylthiouracil
Noun
a crystalline compound used as an antithyroid drug in the treatment of goiter
psilomelane
Noun
a mineral consisting of hydrated basic oxide of manganese and barium
pyridine
Noun
a toxic colorless flammable liquid organic base with a disagreeable odor
pyrite
Noun
a common mineral (iron disulfide) that has a pale yellow color
phosphor bronze
Noun
a corrosion-resistant bronze containing phosphorus
pyrites
Noun
any of various metallic-looking sulfides (of which pyrite is the commonest)
pewter
Noun
any of various alloys of tin with small amounts of other metals (especially lead)
pyrolusite
Noun
a mineral consisting of manganese dioxide
putty
Noun
a dough-like mixture of whiting and boiled linseed oil
putty
Verb
apply putty in order to fix or fill
pot metal
Noun
an alloy of copper and lead used especially for making large pots
pot metal
Noun
cast iron used for making cooking wares
pyromorphite
Noun
a mineral consisting of lead chloride and phosphate
pyrophyllite
Noun
a white or greenish aluminum silicate mineral (resembles talc)
pyroxene
Noun
any of a group of crystalline silicate mineral common in igneous and metamorphic rocks
pyrrhotite
Noun
a brownish iron sulfide mineral (FeS) having weak magnetic properties
pyrrhotine
Noun
a brownish iron sulfide mineral (FeS) having weak magnetic properties
purine
Noun
a colorless crystalline organic base containing nitrogen
purine
Noun
any of several bases that are derivatives of purine
phosphoprotein
Noun
containing chemically bound phosphoric acid
propenyl alcohol
Noun
an unsaturated primary alcohol present in wood spirit