siderostat Meaning, Definition & Usage

Sid"er*o*stat noun
Etymology
L. sidus, sideris, a star + Gr. standing, fixed, fr. to place.
Definitions
  1. (Astron.) 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.

Webster 1913