The Collaborative International Dictionary of English v.0.48:
Pipistrel \Pi*pis"trel\, Pipistrelle \Pip`i*strelle"\, n. [F. pipistrelle, It. pipistrello.] (Zool.) A small European bat (Vesperugo pipistrellus); -- called also flittermouse. [1913 Webster]WordNet (r) 3.0 (2006):
pipistrel n 1: small European brown bat [syn: pipistrelle, pipistrel, Pipistrellus pipistrellus]