Triangular

triangular
    adj 1: having three angles; forming or shaped like a triangle;
           "a triangular figure"; "a triangular pyrimid has a
           triangle for a base"
    2: having three sides; "a trilateral figure" [syn: {trilateral},
       {triangular}, {three-sided}]
    

Compasses \Com"pass*es\, n., pl.
   An instrument for describing circles, measuring figures,
   etc., consisting of two, or (rarely) more, pointed branches,
   or legs, usually joined at the top by a rivet on which they
   move.
   [1913 Webster]

   Note: The compasses for drawing circles have adjustable pen
         points, pencil points, etc.; those used for measuring
         without adjustable points are generally called
         dividers. See {Dividers}.
         [1913 Webster]

   {Bow compasses}. See {Bow-compass}.

   {Caliber compasses}, {Caliper compasses}. See {Calipers}.

   {Proportional}, {Triangular}, etc., {compasses}. See under
      {Proportional}, etc.
      [1913 Webster]
    

Triangular \Tri*an"gu*lar\, a. [L. triangularis: cf. F.
   triangulaire.]
   1. Having three angles; having the form of a triangle.
      [1913 Webster]

   2. (Bot.) Oblong or elongated, and having three lateral
      angles; as, a triangular seed, leaf, or stem.
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   {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} (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}.
      [1913 Webster]
    

44 Moby Thesaurus words for "triangular":
      cuneate, cuneated, cuneiform, deltoid, fan-shaped, oxygonal, three,
      three-cornered, three-dimensional, three-footed, three-in-one,
      three-pronged, three-sided, triadic, trial, triangulate, triarch,
      trichotomous, tricorn, tricornered, tricuspid, trident, tridental,
      trifid, triflorate, triflorous, trifurcate, trigonal, trigonoid,
      trigrammatic, trihedral, trilateral, trimerous, trinal, trine,
      triparted, tripartite, triple, triplex, tripodic, triquetral,
      triquetrous, trisected, triune