Dog tooth

dog tooth
An ornamental motif consisting of a square, four-leafed figure, the center of which projects in a point. It was a very populare in Early English (Early Gothic) architecture. Compare with other repetative decorative motifs.
dome ...

Dog Tooth Molding:
An ornamental feature in which pairs of 'tooth-like' pieces of wood or stone are set to each other in diagonal rows.
Double-Doweled: ...

dog tooth - a small square decoration that slopes to a point in the middle of the square.

See also: Ground, Ornament, Cathedral, Gothic, Architecture