heliostat

Etymology
Circa 1750, from, from +.

Noun

 * 1) A device that includes a plane mirror which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the sun's apparent motions in the sky. The target may be a physical object, distant from the heliostat, or a direction in space, and is almost always stationary relative to the heliostat, so the light is reflected in a fixed direction.

Translations

 * Catalan: heliòstat
 * French:
 * German:
 * Ido:
 * Italian: eliostato
 * Spanish: ,

Etymology
.