a small, hard tumor which is produced on the back of a horse by the heat or pressure of the saddle in traveling.-a small tumor produced by the larvae of the gadfly in the backs of horses, cattle, etc. called also warblet, warbeetle, warnles.-see wormil.-to sing in a trilling, quavering, or vibratory manner; to modulate with turns or variations; to trill; as, certain birds are remarkable for warbling their songs.-to utter musically; to modulate; to carol.-to cause to quaver or vibrate.-to be quavered or modulated; to be uttered melodiously.-to sing in a trilling manner, or with many turns and variations.-to sing with sudden changes from chest to head tones; to yodel.-a quavering modulation of the voice; a musical trill; a song.