theodolite

Etymology

From New Latin theodolitus (1571), perhaps containing Ancient Greek θέᾱ (théā, “sight, view”) and Arabic العِضَادَة (al-ʕiḍāda, “astrolabe, alidade”); if so, doublet of alidade.

noun

  1. A surveying instrument, consisting of a small mounted telescope, used to measure horizontal and vertical angles.
    1999, Yangquan Chen, Extracting aerobomb's aerodynamic drag coefficient curve from theodolite data via iterative learning 1:

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