褪黑激素 Save Sign in to save words tuìhēijīsù ㄊㄨㄟˋ ㄏㄟ ㄐㄧ ㄙㄨˋ melatonin biochemistry Character by character 褪(tuì)take off 黑(hēi)short name for Heilongjiang 黑龙江 hēilóngjiāng 激(jī)arouse 素(sù)raw silk A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0