Arris Definition

ărĭs
arrises
noun
The sharp edge or ridge formed by two surfaces meeting at an angle, as in a molding.
American Heritage
The edge made by two straight or curved surfaces coming together at an angle, as in a molding.
Webster's New World

A sharp edge or ridge formed by the intersection of two surfaces.

Wiktionary

(architecture) A sharp edge or ridge formed by the intersection of two curved surfaces.

Wiktionary
(archaeology) A ridge formed on the surface of flaked stone that results from the intersection of two or more flake removals. The arris marks the location of flake scars on the dorsal surface of chipped stone.
Wiktionary

Other Word Forms of Arris

Noun

Singular:
arris
Plural:
arrises

Origin of Arris

  • From Old French areste, from Latin arista (“beard (of grain), fishbone”)

    From Wiktionary

  • Alteration of Old French areste fishbone, spine arête

    From American Heritage Dictionary of the English Language, 5th Edition

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