dogtooth

[dawg-tooth, dog-]
noun
1.
Also, dog tooth. a canine tooth.
2.
Architecture. any of a series of small pyramidal ornaments, usually formed by a radiating arrangement of four sculptured leaves, set close together in a concave molding, used especially in England in the 13th century.

Origin:
1545–55; dog + tooth

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World English Dictionary
dogtooth (ˈdɒɡˌtuːθ)
 
n , pl -teeth
1.  another name for a canine
2.  architect a carved ornament in the form of four leaflike projections radiating from a raised centre, used in England in the 13th century

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Dogtooth soils occur on micro-lows on flats and fans.
Dogtooth soils have a dense, sodium affected subsoil that restricts root growth.
Pockets of dogtooth spar, which are sharp-ended crystals, formed when the limestone was still deeply buried under younger rocks.
The exterior design of the house includes contrasting brick in corbelled and dogtooth courses.
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