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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.