1) Bat 1) Genus vespertilio 2) Mammal genus 
Vespertilio is a genus of bats in the Vespertilionidae family. Species within this genus are: ...
• (n.) A genus of bats including some of the common small insectivorous species of North America and Europe.
Ves`per·til'i·o noun [ Latin , a bat.] (Zoology) A genus of bats including some of the common small insectivorous species of North America and Europe. 
[n] - a genus of Vespertilionidae
Vespertilio A genus of bats including some of the common small insectivorous species of North America and Europe.
genus Vespertilio noun a genus of Vespertilionidae