1. In cats and dogs, acute inflammation of the external ear and auditory canal.

See: aphtha.

2. In the horse, a process similar to but more advanced than thrush; the horny frog is generally under-run with a whitish, cheeselike exudate, and the entire sole and even the wall of the hoof may be undermined.

3. In man, an outmoded term for aphthae.

Origin: L. Cancer

(05 Mar 2000)