Pronunciation: (trip'tu-fan"), [key]
an essential amino acid, (C8H6N)CH2CH(NH2)COOH, colorless, crystalline, and aromatic, released from proteins by tryptic digestion and a precursor of serotonin. Abbr: Trp; Symbol: W Also,tryp•to•phanePronunciation: (trip'tu-fān"). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.