Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
essential amino acid | Yes | No | No | No |
methionine | Yes | No | No | No |
essential amino acid (noun) | methionine (noun) |
---|---|
an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet | a crystalline amino acid containing sulfur; found in most proteins and essential for nutrition |