Definify.com
Webster 1913 Edition
Triangular
Tri-an′gu-lar
,Adj.
[L.
triangularis
: cf. F. triangulaire
.] 1.
Having three angles; having the form of a triangle.
2.
(Bot.)
Oblong or elongated, and having three lateral angles;
as, a
. triangular
seed, leaf, or stemTriangular compasses
, compasses with three legs for taking off the angular points of a triangle, or any three points at the same time.
– Triangular crab
(Zool.)
, any maioid crab; – so called because the carapace is usually triangular.
– Triangular numbers
(Math.)
, the series of numbers formed by the successive sums of the terms of an arithmetical progression, of which the first term and the common difference are 1. See
Figurate numbers
, under Figurate
.Webster 1828 Edition
Triangular
TRIAN'GULAR
,Adj.
In botany, a triangular stem has three prominent longitudinal angles; a triangular leaf has three prominent angles, without any reference to their measurement or direction.