A Chine

1. The top of a ridge.
2. The spine of an animal.
3. A piece of the backbone of an animal, with the adjoining parts, cut for cooking.
4. (nautical) A sharp angle in the cross section of a hull.
5. (aeronautics) A longitudinal line of sharp change in the cross-section profile of the fuselage or similar body.
6. (nautical) A hollowed or bevelled channel in the waterway of a ship's deck.
7. The edge or rim of a cask, etc., formed by the projecting ends of the staves; the chamfered end of a stave.
8. The back of the blade on a scythe.