— vespertilionid /ves'peuhr til"ee euh nid/ , n. , adj.
/ves'peuhr til"ee euh nuyn', -nin/ , adj.
of or pertaining to the bats of the subfamily Vespertilioninae, common in temperate regions and including most familiar species.
[ 1870-75; Vespertilionae, equiv. to Vespertilion-, s. of Vespertilio a genus (L vespertilio bat, deriv. of vesper evening; see VESPER) + -inae -INAE ]