WordReference Random House Unabridged Dictionary of American English © 2025
coe•lo•stat
(sē′lə stat′),USA pronunciation n. [Astron.]
- Astronomyan apparatus consisting of a mirror driven by clockwork, used to enable a fixed telescope to keep the same area of sky in its field of view by compensating for the apparent rotation of the celestial sphere. Cf. siderostat.
- coelo- (for Latin caeli-, combining form of caelum sky) + -stat 1895–1900