noun any species of cyclorhis, a genus of tropical american birds allied to the tits.
2. greenlet ·noun l. (zool.) one of numerous species of small american singing birds, of the genus vireo, as the solitary, or blue-headed (vireo solitarius); the brotherly-love (v. philadelphicus); the warbling greenlet (v. gilvus); the yellow-throated greenlet (v. flavifrons) and others. ·see vireo.