1) Back 2) Back of a saddle 3) Backrest 4) French word used in English 5) Part of a saddle 6) Rear of a saddle 7) Saddle seat back 8) The back of a saddle 9) The back of a saddle seat 1) Part 
corner, edge or slice of anything
• (n.) A corner or edge of anything; a piece; a fragment; a part. • (v. t.) To cut in pieces; to cut out from. • (n.) The upwardly projecting rear part of saddle, opposite to the pommel.
Can'tle noun [ Old French cantel , chantel , corner, side, piece, French chanteau a piece cut from a larger piece, dim. of Old French cant edge, corner. See 1st Cant .] 1. A corner or edge of anything; a piece; a fragment; a part. 'In one cantle of hi...Can'tle transitive verb To cut in pieces; to cut out from. [ Obsolete] [ Written also cantile .]
The back of the seat of the saddle The part of the saddle which projects upwards toward the rear
[n] - the back of a saddle seat
noun the back of a saddle seat