[ trig-uh-nom-i-tree ]
See synonyms for: trigonometrytrigonometric on

  1. the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the calculations based on them.

Origin of trigonometry

1605–15; <New Latin trigōnometria;see trigon, -o-, -metry

Other words from trigonometry

  • trig·o·no·met·ric [trig-uh-nuh-me-trik], /ˌtrɪg ə nəˈmɛ trɪk/, trig·o·no·met·ri·cal, adjective
  • trig·o·no·met·ri·cal·ly, adverb
  • non·trig·o·no·met·ric, adjective
  • non·trig·o·no·met·ri·cal, adjective
  • non·trig·o·no·met·ri·cal·ly, adverb
  • un·trig·o·no·met·ric, adjective
  • un·trig·o·no·met·ri·cal, adjective
  • un·trig·o·no·met·ri·cal·ly, adverb

Words Nearby trigonometry Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use trigonometry in a sentence

  • Who by an accurate trigonometry and furniture of Instruments, hath inriched, as well geometry, as Astronomy.

    William Oughtred | Florian Cajori
  • Is it a good thing to let a boy use a surveying instrument unless he first learns trigonometry?

    William Oughtred | Florian Cajori
  • In point of fact, let us proceed to "trace a curve," as we say in the differential and integral trigonometry.

British Dictionary definitions for trigonometry


/ (ˌtrɪɡəˈnɒmɪtrɪ) /

  1. the branch of mathematics concerned with the properties of trigonometric functions and their application to the determination of the angles and sides of triangles. Used in surveying, navigation, etc: Abbreviation: trig

Origin of trigonometry

C17: from New Latin trigōnometria from Greek trigōnon triangle

Derived forms of trigonometry

  • trigonometric (ˌtrɪɡənəˈmɛtrɪk) or trigonometrical, adjective
  • trigonometrically, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for trigonometry


[ trĭg′ə-nŏmĭ-trē ]

  1. The study of the properties and uses of trigonometric functions.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.