Rear"mouse`, Rere"mouse` (?), n. [AS. hr&emac;rem&umac;s; probably fr. hr&emac;ran to agitate, stir (akin to G. ruhren, Icel. hraera) + m&umac;s mouse.] Zool.
The leather-winged bat (Vespertilio murinus).
© Webster 1913.