Main Entry: pip·is·trelle

Pronunciation: \ˌpi-pə-ˈstrel\

Function: noun

Etymology: French, from Italian pipistrello bat, alteration of vipistrello, ultimately from Latin vespertilion-, vespertilio — more at vespertilian

Date: 1781

: any of a genus (Pipistrellus of the family Vespertilionidae) of bats typically appearing in early evening and exhibiting erratic flight; especially : one (P. pipistrellus) of Eurasia and northern Africa