HyperDic: tryptophan

English > 1 sense of the word tryptophan:
NOUNsubstancetryptophan, tryptophanean amino acid that occurs in proteins
English > tryptophan: 1 sense > noun 1, substance
MeaningAn amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin.
Broaderessential amino acidAn amino acid that is required by animals but that they cannot synthesize

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