Her. Describes the head of an animal sans neck; in a *blazon the description would read, e.g. a bull's head caboshed. The word has a curious etymology, being derived from the OldFr. verb cabocher = to cabbage, meaning to cut off an animal's head from close behind the ears, thus leaving the neck on the body.
Cf. Couped
Dictionary of Medieval Terms and Phrases. Christopher Coredon with Ann Williams.