- a bat.
Origin of reremouse
before 1100; Middle English reremous, Old English hrēremūs, equivalent to hrēre- (origin uncertain; perhaps akin to hrēran to move) + mūs mouse
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- an archaic or dialect word for bat 2
Old English hrēremūs, probably from hrēran to move + mūs mouse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012