Meaning of TRIANGULAR
Pronunciation:   trI'anggyulur



WordNet Dictionary 

 Definition:  
 [adj] having three sides; "a trilateral figure"
 [adj] involving three parties or elements; "the triangular motherfatherchild relationship"; "a trilateral agreement"; "a tripartite treaty"; "a tripartite division"; "a threeway playoff"
 [adj] having three angles; forming or shaped like a triangle; "a triangular figure"; "a triangular pyrimid has a triangle for a base"


TRIANGULAR is a 10 letter word that starts with T. 
 Synonyms:   angular, angulate, manysided, multilateral, threeparty, threesided, threeway, trilateral, tripartite 
 
Webster's 1913 Dictionary 

 Definition:   \Tri*an"gu*lar\, a. [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 stem.
{Triangular compasses}, compasses with three legs for taking
off the angular points of a triangle, or any three points
at the same time.
{Triangular crab} (Zo["o]l.), 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}.



