dormouse
Concise Oxford English Dictionary © 2008 Oxford University Press:
dormouse/ˈdɔːmaʊs/
▶noun (pl. dormice) an agile mouse-like rodent with a bushy tail. [Muscardinus avellanarius and other species, family Gliridae .]
– origin ME: of unknown origin, but assoc. with Fr. dormir or L. dormire ‘to sleep’.
'dormouse' also found in these Oxford entries:

