[ar-is] 
| 1. | a sharp ridge, as between adjoining channels of a Doric column. |
| 2. | the line, ridge, or hip formed by the meeting of two surfaces at an exterior angle. |
| ar·ris (ār'ĭs) 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.] |
ɪs