Trig'o-no-mēt'ri-cal

} Of, or pertaining to, trigonometry: performed by, or according to, the rules of trigonometry.

Trigonometrical curves, curves which may be constructed from the properties of the trigonometrical lines. — Trigonometrical lines, lines which are employed in solving the different cases of plane and spherical trigonometry, as sines, tangents, secants, and the like. These lines, or the lengths of them, are called the trigonometrical functions of the arcs to which they belong. — Trigonometrical survey, a survey of a portion of country by measuring a single base, and connecting it with various points in the tract surveyed by a series of triangles, the angles of which are carefully measured, the relative positions and distances of all parts being computed from these data.