coelostat Hear it!

coelostat definition

coe·lo·stat (sē′lə stat′)

noun

an optical system, used with a fixed telescope, consisting of two mirrors with a moving mirror mounted on an axis parallel to the earth's axis of rotation and driven by clockwork so as to reflect the same portion of the sky continuously or to track the sun

Etymology: < L caelum, sky, heavens + -stat

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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