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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

substance go
the real physical matter of which a person or thing consists

material, stuff go
the tangible substance that goes into the makeup of a physical object

chemical, chemical substance go
material produced by or used in a reaction involving changes in atoms or molecules

compound, chemical compound go
(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

organic compound go
any compound of carbon and another element or a radical

amino acid, aminoalkanoic acid
organic compounds containing an amino group and a carboxylic acid group

noun.substance

23 Subcategories

alanine go
a crystalline amino acid that occurs in many proteins
asparagine go
a crystalline amino acid found in proteins and in many plants (e.g., asparagus)
aspartic acid go
a crystalline amino acid found in proteins and occurring naturally in sugar beets and sugar cane
canavanine go
an amino acid found in the jack bean
citrulline go
an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine
cysteine go
an amino acid containing sulfur that is found in most proteins
cystine go
a crystalline amino acid found in proteins (especially keratin)
dopa, dihydroxyphenylalanine go
amino acid that is formed in the liver and converted into dopamine in the brain
essential amino acid go
an amino acid that is required by animals but that they cannot synthesize
gamma aminobutyric acid, GABA go
an amino acid that is found in the central nervous system
glutamic acid, glutaminic acid go
an amino acid occurring in proteins
glutamine go
a crystalline amino acid occurring in proteins
glycine go
the simplest amino acid found in proteins and the principal amino acid in sugar cane
hydroxyproline go
a crystalline amino acid obtained from gelatin or collagen
iodoamino acid go
an amino acid with iodine added
ornithine go
an amino acid that does not occur in proteins but is important in the formation of urea
proline go
an amino acid that is found in many proteins (especially collagen)
creatine, creatin go
an amino acid that does not occur in proteins but is found in the muscle tissue of vertebrates both in the free form and as phosphocreatine
sarcosine go
a sweetish crystalline amino acid
serine go
a sweetish crystalline amino acid involved in the synthesis by the body of cysteine
thyronine go
a phenolic amino acid of which thyroxine is a derivative
tyramine go
amino acid derived from tyrosine
tyrosine go
an amino acid found in most proteins