(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)
... useful in the border (Fig. 252). They are common in rich woods and copses. Dig the tubers in late summer and plant them directly in the border. The large ones will bloom the following spring. The same may be said of the erythronium, or dog's-tooth violet or adder's tongue, and of very ... — Manual of Gardening (Second Edition) • L. H. Bailey