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Definitions
A mirror device that tracks the sun and reflects light toward a fixed target.
Word origin
First use appear c. 1747, from New Latin heliostata, from Ancient Greek ἥλιος (hḗlios, “sun”) + Latin status (“stationary”). By surface analysis, helio- + -stat.
Used in a sentence
“Each heliostat can be directed to bathe a particular park bench or tree in a beam of light. […] The three heliostats cost $355,000 together, not apiece.”
“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.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
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