多巴胺 duōbā'àn dopamine Definitions Defs Origin Strokes Stroke Words Sentences Sents 莱克多巴胺 láikèduōbā'àn ractopamine (loanword) ractopamine, an animal feed additive used to promote leanness; a chemical compound in organic chemistry莱克多巴胺猪肉 láikèduōbā'ānzhūròu ractopamine pork pork from livestock that has been fed the additive ractopamine