THEODOLITES

Noun

theodolites

plural of theodolite

Source: Wiktionary

THEODOLITE

The*od"o*lite, n. Etym: [Probably a corruption of the alidade. See Alidade.]

Definition: An instrument used, especially in trigonometrical surveying, for the accurate measurement of horizontal angles, and also usually of vertical angles. It is variously constructed.

Note: The theodolite consists principally of a telescope, with cross wires in the focus of its object glass, clamped in Y's attached to a frame that is mounted so as to turn both on vertical and horizontal axes, the former carrying a vernier plate on a horizontal graduated plate or circle for azimuthal angles, and the latter a vertical graduated arc or semicircle for altitudes. The whole is furnished with levels and adjusting screws and mounted on a tripod.

Source: Webster’s Unabridged Dictionary 1913 Edition

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