arris

[ar-is]
noun Architecture.
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.
Also called piend.


Origin:
1670–80; < Middle French areste; see arête

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World English Dictionary
arris (ˈærɪs)
 
n , pl -ris, -rises
a sharp edge at the meeting of two surfaces at an angle with one another, as at two adjacent sides of a stone block
 
[C17: apparently from Old French areste beard of grain, sharp ridge; see arête]

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Example sentences
Measurement shall be made along the top arris line of the face of the curb.
Measurement shall be made along the top arris line of face of curb.
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