The canine teeth of a dog, or a specific architectural or decorative pattern resembling dog teeth.
From 'dog' + 'teeth.' The architectural pattern called 'dogtooth' or 'dogteeth' became popular in medieval and Gothic architecture, where small pyramid-shaped ornaments arranged in rows resembled the fanged teeth of a dog.
Medieval architects used the 'dogtooth' pattern as a way to add visual interest and texture to stone buildings—it's one of those architectural details that's purely decorative but became so standard that it's now a recognized historical marker of certain building periods.
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