1) Genus pipistrellus 2) Mammal genus 
Pipistrellus is a genus of bats in the family Vespertilionidae and subfamily Vespertilioninae. The name of the genus is derived from the Italian word pipistrello, meaning `bat` (from Latin vespertilio `bird of evening, bat`). The size of the genus has been considerably reduced as a result of work during the 1990s and 2000s, with genera such as...
[n] - nearly cosmopolitan genus of very small bats
pipistrellus A nearly cosmopolitan genus of very small bats.
genus Pipistrellus noun nearly cosmopolitan genus of very small bats