triangular
adj. B1 Intermediate US //tɹaɪˈæŋɡjəɫɝ// UK //tɹaɪˈænɡjʊlɐ// tri·an·gu·lar
adj. having the shape of a triangle, with three sides and three corners.
adj. shaped like a triangle; having three sides and three angles. Typically used attributively to describe geometric properties or physical objects.
The sandwich was cut into triangular pieces.
The architect designed a triangular roof to help the snow slide off more easily during the winter.
The sailors navigated toward a triangular rock formation that served as a natural landmark for the entrance to the hidden bay.
From Middle English triangulare, trianguler, triangulere, from Old French triangulaire, triangulier and Latin triangulāris. By surface analysis, tri- + -angular.
Usage
Typically placed before the noun it modifies.