DICT.TW Dictionary Taiwan

 Ar·ris n.  Arch. The sharp edge or salient angle formed by two surfaces meeting each other, whether plane or curved; -- applied particularly to the edges in moldings, and to the raised edges which separate the flutings in a Doric column.
 Arris fillet, a triangular piece of wood used to raise the slates of a roof against a chimney or wall, to throw off the rain. --Gwilt.
 Arris gutter, a gutter of a V form fixed to the eaves of a building. --Gwilt.
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