Source : Webster's Revised Unabridged Dictionary (1913)

Flittermouse \Flit"ter*mouse`\, n. [Flitter, v.i. + mouse; cf.
   G. fledermaus, OHG. fledarm[=u]s. Cf. {Flickermouse},
   {Flindermouse}.] (Zo["o]l.)
   A bat; -- called also {flickermouse}, {flindermouse}, and
   {flintymouse}.