I. (ˈ)trī|aŋgyələ(r), -aiŋ- adjective
Etymology: Late Latin triangularis, from Latin triangulum triangle + -aris -ar
1.
a. : of, relating to, or consisting of a triangle : having three angles, corners, or sides : having the form of a triangle
a triangular plot of land
a triangular ruler
he had a triangular face with high and broad forehead — J.M.Phalen
b. : having a principal surface of triangular shape
a triangular chair
a triangular table
2.
a. : having a base that is a triangle
a triangular prism
a triangular pyramid
b. : shaped or edged like a triangular prism or pyramid
3.
a.
(1) : of, relating to, or involving three elements, factions, parts, persons, or states
before the child enters the triangular mother-father-child relationship — Edmund Bergler
a triangular trade between Peru, Europe, and the United States — H.T.Brundidge
a triangular agreement
(2) of a military group : based primarily on three units
a triangular army division
— compare square
b. : of or relating to a love triangle
triangular plot of a novel
a triangular love affair
• tri·an·gu·lar·i·ty (ˈ)trī|aŋgyəˈlarəd.ē, -aiŋ-, -lətē, -i also -ler- noun -es
• tri·an·gu·lar·ly adverb
II. noun
( -s )
: triangle 3f