trig ‧ o ‧ nom ‧ e ‧ try /ˌtrɪɡəˈnɒmətri, ˌtrɪɡəˈnɒmɪtri $ -ˈnɑː-/ BrE AmE 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 ↑ triangle s