Vireo

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Vireo \Vir"e*o\, n. [L., a species of bird.] (Zo["o]l.) Any one of numerous species of American singing birds belonging to Vireo and allied genera of the family Vireonid[ae] . In many of the species the back is greenish, or olive-colored. Called also greenlet ...

Wiktionary Word definitions in Wiktionary
n. Any of various birds in the genus ''Hylophilus''.