warble2 /ˈwôrbəl, ˈwɔrbəl 
/ ▸ noun a swelling or abscess beneath the skin on the back of cattle, horses, and other mammals, caused by the presence of the larva of a warble fly. ▪ the larva of the warble fly.
– ORIGIN late Middle English : of uncertain origin.
EnglishOxford New American Dictionary
