小白鼠 xiǎobáishǔ white mouse Origin Definitions Defs Strokes Stroke Words Sentences Sents 小 xiǎo adjective small small; tiny; few; minor; in area, volume, quantity, or power, being less than average or less than the object of comparison; opposite of 大 dà白鼠 báishǔ noun white mouse a white mouse or rat; an albino variety of the common mouse