牛海绵状脑病 niúhǎimiánzhuàngnǎobìng mad cow disease Origin Definitions Defs Strokes Stroke Words Sentences Sents 牛 niú noun ox ox; cow; bull; cattle; any of various bovine animals海绵状 海綿狀 hǎimiánzhuàng spongy spongy; porous or sponge-like in texture脑病 腦病 nǎobìng brain disease brain disease; encephalopathy