hydroxytryptophanWiktionary 原文英美构词拆解hydroxyhydroxy-前缀tryptophantryptophan词干hydroxy-(chemistry) having, or derived from, a hydroxyl radical词源说明From hydroxy- + tryptophan.释义名词noun1(biochemistry) A hydroxy derivative of tryptophan; especially 5-hydroxytryptophan which is a precursor to the neurotransmitter serotonin