Definition of "trigonometrical" [trigonometrical]

• Of, pertaining to, or obtained using trigonometry (adjective)

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• "Surveying and building trigonometrical station on a light-coloured hill to the south of this."
• "According to his biographer, Carlyle had studied astronomy, and in the summer of 1817 had come upon "the site of a trigonometrical survey" while hiking with a friend. 2 The pair was given a guided tour of the site, and were allowed to peer through the surveyors 'theodolite."
• "If any one shall attempt to determine this ellipse by trigonometrical computation from three observations (as is usual) he will be proceeding without due caution."