coelostat

 : 
Noun
 : 
coe=lo=stat

WORDNET DICTIONARY

Noun coelostat has 1 sense

CIDE DICTIONARY

coelostatn. 
     an optical instrument used to follow the path of a celestial body and reflect its light into a telescope; it has a movable and a fixed mirror.  [WordNet 1.5]

OXFORD DICTIONARY

coelostat, n. Astron. an instrument with a rotating mirror that continuously reflects the light from the same area of sky allowing the path of a celestial body to be monitored.

Etymology
L caelum sky + -STAT

For further exploring for "coelostat" in Webster Dictionary Online


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