cantle

n. back part of a saddle that is usually curved upwards; segment, corner, portion or piece (also cantel)

A saddle is a seat for a rider fastened to an animal's back. The most common type is the equestrian saddle designed for a horse, but specialized saddles have been created for camels and other creatures.
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Noun
1. the back of a saddle seat
(hypernym) back, backrest
(part-holonym) saddle

(v. t.)
To cut in pieces; to cut out from.
  

(n.)
The upwardly projecting rear part of saddle, opposite to the pommel.
  

(n.)
A corner or edge of anything; a piece; a fragment; a part.
  

      lancet