[ves-per-til-ee-uh-nahyn, -nin]
  1. of or relating to the bats of the subfamily Vespertilioninae, common in temperate regions and including most familiar species.

Origin of vespertilionine

1870–75; < New Latin Vespertilionae, equivalent to Vespertilion-, stem of Vespertilio a genus (Latin vespertiliō bat, derivative of vesper evening; see vesper) + -inae -inae
Related formsves·per·til·i·o·nid [ves-per-til-ee-uh-nid] /ˌvɛs pərˈtɪl i ə nɪd/, noun, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for vespertilionine


  1. of, relating to, or belonging to the Vespertilionidae, a family of common and widespread bats
Derived Formsvespertilionid (ˌvɛspəˈtɪlɪənɪd), adjective, noun

Word Origin for vespertilionine

C17: from Latin vespertīliō a bat, from vesper evening
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012