Synonyms of the word

trilateral

• adj. Having three sides.

many-sided

• adj. Having many sides; polygonal.
• adj. Having many aspects.

multilateral

• adj. Having many sides or points of view.
• adj. Involving more than one party (often used in politics to refer to negotiations, talks, or proceedings…

polygon

• n. (geometry) A plane figure bounded by edges that are all straight lines.
• n. (geometry) The boundary of such a figure.
• n. (geometry, more generally) A figure comprising vertices and (not necessarily straight) edges, alternatingly.
• n. (geometry) Such a figure and its interior, taken as a whole.

three-way

• adj. (attributive) relating to three different directions.
• n. Sexual activity involving three persons; a threesome; a ménage à trois.
• n. A serving of Cincinnati chili with spaghetti and cheese.

triangle

• n. (geometry) A polygon with three sides and three angles.
• n. (US, Canada) A set square.
• n. (music) A percussion instrument made by forming a metal rod into a triangular shape which is open at one…
• n. (cue sports) A triangular piece of equipment used for gathering the balls into the formation required…
• n. A love triangle.
• n. (systemics) The structure of systems composed with three interrelated objects.
• n. A draughtsman's square in the form of a right-angled triangle.
• n. (historical) A frame formed of three poles stuck in the ground and united at the top, to which soldiers…

triangular

• adj. Shaped like a triangle.
• adj. Of, or pertaining to, triangles.
• adj. Having a triangle as a base; as, a triangular prism, a triangular pyramid.
• adj. Having three elements or parties; trilateral, tripartite.

trigon

• n. (geometry, rare) A triangle.
• n. An ancient triangular harp of Oriental origin which had four strings and was often used for banquet music…
• n. (astrology) A division consisting of three signs.
• n. (astrology) A trine; an aspect of two planets distant 120 degrees from each other.
• n. An old ball game played by three people standing in a triangular formation.
• n. (zoology) The cutting region of the crown of an upper molar, usually the anterior part.

tripartite

• adj. In three parts.
• adj. Done by three parties (as an agreement).