SIDEROSTAT
Etymology
Noun
siderostat (plural siderostats)
(astronomy) A heliostat that may be used with stars as well as the sun.
Source: Wiktionary
Sid"er*o*stat, n. Etym: [L. sidus, sideris, a star + Gr. (Astron.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
Recent Word Finds
Word of the Day
22 December 2024
SUNGLASSES
(noun) (plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun; “he was wearing a pair of mirrored shades”
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