I.having three corners or angles, threecornered, triangular.
I. Adj.: “sidera,” Cic. Div. 2, 42, 89: “forma cutis,” Cels. 7, 25, 2: “species (Siciliae),” Plin. 3, 8, 14, § 86: “ager,” Col. 5, 2, 5: “latera radicis,” id. 13, 11, 218 et saep.—
II. Substt.
a. trĭangŭlum , i, n., a triangle: “quadrata amplius spatium complectuntur triangulis,” Quint. 1, 10, 41; so id. 1, 10, 3; Cic. N. D. 2, 49, 125; Plin. 27, 8, 39, § 61.—
b. trĭangŭlus , i, m., a triangle, Front. Expos. Form. pp. 32, 33, 35 Goes.