theodolite

/θiˌɑdəˈlaɪt/

Other forms: theodolites

Use the noun theodolite to describe the telescope-like tool that surveyors use to precisely measure horizontal and vertical angles in three dimensions.

Land surveyors, who measure the distances and angles between points for mapmakers or property owners, are familiar with theodolites. A theodolite is an instrument for measuring angles, especially horizontal ones. The Latin prefix theo, which often means "god," here probably has nothing to do with deities. Theodolite was coined from the Latin theodelitus in the sixteenth century, but even experienced etymologists scratch their heads as to how the word was formed.

Definitions of theodolite

1. noun

   a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod
   synonyms: transit

   types:

   tacheometer, tachymeter

   a theodolite designed for rapid measurements

   type of:

   surveying instrument, surveyor's instrument

   an instrument used by surveyors