Etymology

coelostat

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Today it means: A device that rotates a telescope so as to keep its orientation constant with relation to the stars. Full definition →

Latin coelestis
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The story

  1. Latin · derived fromcoelestis“sky”
  2. English todaycoelostat

Related to Latin coelestis (“sky”), corrupted form of caelestis, + -stat.

Etymology from Wiktionary, CC BY-SA 4.0.