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Definition of theodolite noun from the Oxford Advanced Learner's Dictionary

theodolite

noun

/θiˈɒdəlaɪt/

/θiˈɑːdəlaɪt/

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a piece of equipment used by surveyors for measuring angles
Word Originlate 16th cent. (originally denoting an instrument for measuring horizontal angles): from modern Latin theodelitus, of unknown origin.

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