arris

(aris, er-)

noun

Archit. the edge made by two straight or curved surfaces coming together at an angle, as in a molding

Origin: OFr areste: see arête

See arris in American Heritage Dictionary 4

noun pl. arris or ar·ris·es
The sharp edge or ridge formed by two surfaces meeting at an angle, as in a molding.

Origin:

Origin: Alteration of Old French areste, fishbone, spine; see arête

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