Dog"tooth` (?), n.; pl. Dogteeth (&?;). 1. See Canine tooth, under Canine.

2. (Arch.) An ornament common in Gothic architecture, consisting of pointed projections resembling teeth; -- also called tooth ornament.

Dogtooth spar(Min.), a variety of calcite, in acute crystals, resembling the tooth of a dog. See Calcite. -- Dogtooth violet(Bot.), a small, bulbous herb of the Lily family (genus Erythronium). It has two shining flat leaves and commonly one large flower. [Written also dog's-tooth violet.]