Triplex and Triangular

adjective

• Having three units or components or elements.
  • usage: "a ternary operation"; "a treble row of red beads"; "overcrowding made triple sessions necessary"; "triple time has three beats per measure"; "triplex windows"
  • synonyms: ternary, treble, triple

(a.) Havingthree principal operative parts or motions, so as to produce a three-fold effect.

triplex is a low-rise building comprised of three dwelling units, each with a separate entrance and yard, but sharing some common walls.

adjective

• Having three angles; forming or shaped like a triangle.
  • usage: "a triangular figure"; "a triangular pyrimid has a triangle for a base"
• Having three sides.
  • usage: "a trilateral figure"
  • synonyms: trilateral, three-sided

• (a.) Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf or stem.
• (a.) Having three angles; having the form of a triangle.