|trigənō|me.trik, -rēk adjective
also trig·o·no·met·ri·cal -trə̇kəl, -rēk-
Etymology: trigonometric probably from (assumed) New Latin trigonometricus, from New Latin trigonometria trigonometry + Latin -icus -ic; trigonometrical probably from (assumed) New Latin trigonometric us + English -al
: of, relating to, or involving trigonometry : performed by the rules of trigonometry
• trig·o·no·met·ri·cal·ly -rə̇k(ə)lē, -rēk-, -li adverb