coelostat

noun coe·lo·stat

Definition of coelostat

plural

-s

  1. :  an instrument consisting of an adjustable plane mirror clock-driven on an axis parallel to the axis of the earth and a second fixed mirror that act together to send light from a celestial body in a fixed direction — compare heliostat

There's more!

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!
Already a subscriber? Log in.

Origin and Etymology of coelostat

International Scientific Vocabulary coelo- (from Medieval Latin caelum sky, heaven, from Latin caelum heaven) + -stat


Seen and Heard

What made you want to look up coelostat? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!