trig‧o‧nom‧e‧try /ˌtrɪɡəˈnɒmətri, ˌtrɪɡəˈnɒmɪtri $ -ˈnɑː-/
noun [uncountable][
Date: 1600-1700;
Language: Modern Latin;
Origin: trigonometria, from Greek trigonon 'triangle' + -metria 'measuring']
the part of mathematics concerned with the relationship between the angles and sides of
triangles [TahlilGaran] Dictionary of Contemporary English ▲