| coelostat | (n) optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror |
| coelostat | n. 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 ] |
| シーロスタット | [shi-rosutatto] (n) coelostat [Add to Longdo] |