GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Dogtooth , n.; pl. Dogteeth .
   See Canine tooth, under Canine.
   1913 Webster
   (Arch.) An ornament common in Gothic architecture, consisting of pointed projections resembling teeth; -- also called tooth ornament.
   1913 Webster
   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.]
   1913 Webster