Dentistry. The grinding surface of a molar tooth. Now historical.

Anatomy. The part of a tooth (in early use spec. a molar) that appears above the gum and is covered by enamel.

Anatomy. A projection or protuberance upon the crown of a tooth: cf. cuspidate, adj.

The acting, striking, or working surface of an implement, tool, or the like; the edge of a knife, sword, etc.; the surface of a tooth.

An external cusp on the inner back corner of a mammalian upper molar tooth.

A cusp on a mammalian lower molar tooth corresponding to the hypocone on an upper molar.

the posterior external cusp of a premolar tooth.

An intermediate cusp between the principal ones on the heel of a mammalian lower molar tooth.

transferred. A heel-like part or object. (See quot.)