Definition of "vespertilionid" []

• Any of various widely distributed insect-eating bats of the family Vespertilionidae, characterized by a long tail. (noun)
• Of or belonging to the family Vespertilionidae. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But you might be surprised to learn, as I was, that an inoffensive little vespertilionid is also an awesome tetrapod predator."
• "The mammal fauna consists of seventy-six species, of which two vespertilionid bats are endemic to this ecoregion (Table 1)."
• "There were at least two native mammals in the ecoregion, the Critically Endangered Bonin fruit bat (Pteropus pselaphon), and now Extinct vespertilionid bat Pipistrellus sturdeei."