• synonyms


  1. an instrument for measuring solid angles, as of crystals.
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Origin of goniometer

First recorded in 1760–70; gonio- + -meter
Related formsgo·ni·o·met·ric [goh-nee-uh-me-trik] /ˌgoʊ ni əˈmɛ trɪk/, go·ni·o·met·ri·cal, adjectivego·ni·o·met·ri·cal·ly, adverbgo·ni·om·e·try, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for goniometer

Historical Examples

  • The mineralogist obtains his accurate measurements by means of an instrument known as the goniometer.

    Birds and All Nature Vol VII, No. 1, January 1900


British Dictionary definitions for goniometer


  1. an instrument for measuring the angles between the faces of a crystal
  2. an instrument consisting of a transformer circuit connected to two directional aerials, used to determine the bearing of a distant radio station
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Derived Formsgoniometric (ˌɡəʊnɪəˈmɛtrɪk) or goniometrical, adjectivegoniometrically, adverbgoniometry, noun

Word Origin

C18: via French from Greek gōnia angle
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

goniometer in Medicine


  1. An optical instrument for measuring crystal angles, as between crystal faces.
  2. arthrometer
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.