ar·ris ( r  s)n. pl. arris or ar·ris·es The sharp edge or ridge formed by two surfaces meeting at an angle, as in a molding. [Alteration of Old French areste, fishbone, spine; see arête.] |
arris [ˈærɪs]
n pl -ris, -rises
(Fine Arts & Visual Arts / Architecture) a sharp edge at the meeting of two surfaces at an angle with one another, as at two adjacent sides of a stone block
[apparently from Old French areste beard of grain, sharp ridge; see arête]
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