WordReference Random House Learner's Dictionary of American English © 2014
trig•o•nom•e•try /ˌtrɪgəˈnɑmɪtri/USA pronunciation  n. [uncountable]

    the branch of mathematics that deals with the relations between the sides and angles of triangles:a course in trigonometry.
trig•o•no•met•ric /ˌtrɪgənəˈmɛtrɪk/USA pronunciation adj. See -meter-.

Collins Concise English Dictionary © HarperCollins Publishers::

trigonometry /ˌtrɪɡəˈnɒmɪtrɪ/ n
  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
Etymology: 17th Century: from New Latin trigōnometria from Greek trigōnon triangle

trigonometric /ˌtrɪɡənəˈmɛtrɪk/, ˌtrigonoˈmetrical adj

'trigonometry' also found in these entries:
In the English description:

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