Read Edit View history 色氨酸 sè'ānsuān tryptophan Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 色氨酸 · sè'ānsuān · tryptophan 2026/03/04 色氨酸 sè'ānsuān tryptophan tryptophan (Trp), an essential amino acid 火鸡含有丰富的色氨酸，能助人入眠。 noun created sense Mar 4, 2026, 02:25 AM