trigonometrical adjective. [,trɪg(ǝ)nǝ(ʊ)'mɛtrɪk(ǝ)l] M17.
[from TRIGONOMETRY or mod. Latin trigonometria + -ICAL. Cf. mod. Latin trigonometricus.]
Of, pertaining to, or performed by trigonometry.
trigonometrical point, trigonometrical station Surveying a reference point on high ground used in triangulation and freq. marked by a pillar or other structure. trigonometrical survey a survey of a country or region performed by triangulation and trigonometrical calculation.

■ trigonometrically adverb M17.

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