Definition of coelostat in English:


Syllabification: coe·lo·stat
Pronunciation: /ˈsēləˌstat


  • An advanced version of a heliostat, having a rotating mirror that continuously reflects the light from the same area of sky, allowing the path of a celestial object to be monitored.
    More example sentences
    • This error can be reduced substantially by choosing the coelostat position and time interval.
    • Back in Ottawa, a specially designed shed with a roll off section housed the coelostat for almost 70 years.
    • To create rotating images in the full 360-degree range, two sets of coelostats can be combined, each compensating for the dead zone of the other.


late 19th century: formed irregularly from Latin caelum 'sky' + -stat.

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