Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
essential amino acid | Yes | No | No | No |
phenylalanine | Yes | No | No | No |
essential amino acid (noun) | phenylalanine (noun) |
---|---|
an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet | an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body |