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Bible Dictionaries
Siderostat

Webster's Dictionary

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(n.) An apparatus consisting essentially of a mirror moved by clockwork so as to throw the rays of the sun or a star in a fixed direction; - a more general term for heliostat.

Bibliography Information
Webster, Noah. Entry for 'Siderostat'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/siderostat.html. 1828.
 
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