heliostat.

A device that turns a mirror to keep reflected sunlight directed toward a chosen target as the sun's apparent position changes.

Use it for

Words that belong together

• a heliostat field
• a tracking heliostat
• align a heliostat

On the page

The heliostat tilted almost imperceptibly to keep light on the receiver.

From the ridge, the heliostat field looked like a regiment turning its faces toward a command.

Usage notes

Primary category: sci-fi. Forms: Singular heliostat; plural heliostats. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.