Liberal Dictionary English Dictionary
noun, plural vir·e·os.
- any of several small, insectivorous American birds of the family Vireonidae, having the plumage usually olive-green or gray above and white or yellow below.
noun plural vireos
- any insectivorous American songbird of the family Vireonidae, esp those of the genus Vireo, having an olive-grey back with pale underparts
1834, from Latin vireo, a word Pliny uses for some kind of bird, perhaps the greenfinch, from virere “be green” (see verdure). Applied in modern times to an American bird.