heliostat

See also: Heliostat and héliostat

English

A heliostat. In this case and most others, the mirror rotates on a computer-controlled, motor-driven alt-azimuth mount.

Etymology

Circa 1750, from New Latin heliostata, from Ancient Greek ἥλιος (hḗlios, “sun”) + Latin status (“stationary”).

Noun

heliostat (plural heliostats)

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.
   • 2024, Jasper Fforde, Red Side Story, Hodder & Stoughton, page 90:

     In reply, the clockwork heliostats that had tracked the sun to reflect light into the indoor areas during the day now swivelled towards the street lamp to do the same for the night.

Translations

device to continuously reflect sunlight toward a predetermined target, almost always in some fixed direction, despite the sun's motions in the sky

• Catalan: heliòstat m
• French: héliostat (fr) m
• German: Heliostat (de) m
• Ido: heliostato (io)
• Italian: eliostato
• Spanish: heliostato (es) m, helióstato (es) m

Anagrams

• loathiest, thiolates

Romanian

Etymology

Borrowed from French héliostat.

Noun

heliostat n (plural heliostate)

1. heliostat

Declension

Declension of heliostat

	singular		plural
	indefinite articulation	definite articulation	indefinite articulation	definite articulation
nominative/accusative	(un) heliostat	heliostatul	(niște) heliostate	heliostatele
genitive/dative	(unui) heliostat	heliostatului	(unor) heliostate	heliostatelor
vocative	heliostatule		heliostatelor