Definitions Found:
An apparatus containing a movable or driven mirror, used to reflect sunlight in a fixed direction
- heliostatsAn apparatus containing a movable or driven mirror, used to reflect sunlight in a fixed direction
- heliostatan instrument using a mirror to reflect sunlight in a fixed direction, used for studying the sun or signalling messages
- heliostatsHELIOSTAT, an instrument using a mirror to reflect sunlight in a fixed direction, used for studying the sun or signalling messages