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An optical instrument consisting of a small mounted telescope rotatable in horizontal and vertical planes, used to measure angles in surveying.
[Probably coined by Leonard Digges (1520-1559), English mathematician and surveyor, as the name of a device for measuring horizontal angles, perhaps from Greek theā, a viewing + a second element of unknown origin.]
the·od′o·lit′ic (-lĭt′ĭk) adj.
(Surveying) a surveying instrument for measuring horizontal and vertical angles, consisting of a small tripod-mounted telescope that is free to move in both the horizontal and vertical planes. Also called (in the US and Canada): transit
[C16: from New Latin theodolitus, of uncertain origin]
a precision instrument having a telescopic sight for establishing horizontal and sometimes vertical angles. Compare transit (def. 7).
[earlier theodelitus (1571), of undetermined orig.]
the•od`o•lit′ic (-ˈɪt ɪk) adj.
a surveying instrument for measuring vertical and horizontal angles. — theodolitic, adj.See also: Instruments, Land
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|Noun||1.||theodolite - a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod|
alidad, alidade - surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments