a colorless explosive liquid that is volatile and poisonous and foul-smelling
acetone
Noun
the simplest ketone
argonon
Noun
any of the chemically inert gaseous elements of the helium group in the periodic table
acetylene
Noun
a colorless flammable gas used chiefly in welding and in organic synthesis
alkyne
Noun
a colorless flammable gas used chiefly in welding and in organic synthesis
alicyclic compound
Noun
an aliphatic compound that contains a ring of atoms
aliphatic compound
Noun
organic compound that is an alkane or alkene or alkyne or their derivative
alkylbenzene
Noun
organic compound that has an alkyl group bound to a benzene ring
alkyl halide
Noun
organic compound in which halogen atoms have been substituted for hydrogen atoms in an alkane
acrylonitrile-butadiene-styrene
Noun
any of a class of composite plastics used to make car bodies and cases for computers and other appliances
amino acid
Noun
organic compounds containing an amino group and a carboxylic acid group
aminoalkanoic acid
Noun
organic compounds containing an amino group and a carboxylic acid group
alanine
Noun
a crystalline amino acid that occurs in many proteins
argil
Noun
a white clay (especially a white clay used by potters)
asparagine
Noun
a crystalline amino acid found in proteins and in many plants (e.g., asparagus)
aspartic acid
Noun
a crystalline amino acid found in proteins and occurring naturally in sugar beets and sugar cane
Al
Noun
a silvery ductile metallic element found primarily in bauxite
ammonia alum
Noun
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
ammonium alum
Noun
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
americium
Noun
a radioactive transuranic metallic element
antimony
Noun
a metallic element having four allotropic forms
argon
Noun
a colorless and odorless inert gas
arsenic
Noun
a very poisonous metallic element that has three allotropic forms
arsenic
Noun
a white powdered poisonous trioxide of arsenic
astatine
Noun
a highly unstable radioactive element (the heaviest of the halogen series)
atrazine
Noun
a synthetic compound derived from triazine that is widely used as an agricultural herbicide
azote
Noun
an obsolete name for nitrogen
acidic hydrogen
Noun
a hydrogen atom in an acid that forms a positive ion when the acid dissociates
acid hydrogen
Noun
a hydrogen atom in an acid that forms a positive ion when the acid dissociates
actinide series
Noun
(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium
actinium
Noun
a radioactive element of the actinide series
aluminum
Noun
a silvery ductile metallic element found primarily in bauxite
aluminium
Noun
a silvery ductile metallic element found primarily in bauxite
ader wax
Noun
a waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum
amblygonite
Noun
a white or grey mineral consisting of lithium aluminum phosphate
almandite
Noun
a deep red garnet consisting of iron aluminum silicate
amphibole
Noun
a mineral or mineral variety belonging to the amphibole group
almandine
Noun
a deep red garnet consisting of iron aluminum silicate
almandine
Noun
a purple variety of the ruby spinel
amphibole group
Noun
a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum
amphibolite
Noun
a metamorphic rock composed chiefly of amphibole and plagioclase
apatite
Noun
a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate
aragonite
Noun
a mineral form of crystalline calcium carbonate
argentite
Noun
a valuable silver ore consisting of silver sulfide (Ag2S)
argillite
Noun
a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages
argyrodite
Noun
a rare steel-grey mineral consisting of silver and germanium and sulfur
arsenopyrite
Noun
a silver-white or grey ore of arsenic
asphalt
Noun
a dark bituminous substance found in natural beds and as residue from petroleum distillation