from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various widely distributed insect-eating bats of the family Vespertilionidae, characterized by a long tail.
- adj. Of or belonging to the family Vespertilionidae.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of very many bats of the family Vespertilionidae
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a variety of carnivorous bat
From New Latin Vespertiliōnidae, family name, from Vespertiliō, Vespertiliōn-, type genus, from Latin vespertiliō, bat, from vesper, evening; see wes-pero- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)