Word Study
flittermouse
CIDE DICTIONARY
flittermouse, n. [Flitter, v.i. + mouse; cf. G. fledermaus, OHG. fledarm. Cf. Flickermouse, Flindermouse.].
A bat; -- called also flickermouse , flindermouse , and flintymouse . [1913 Webster]
For further exploring for "flittermouse" in Webster Dictionary Online