Dictionary.com

siderostat

[ sid-er-uh-stat ]
/ ˈsɪd ər əˌstæt /
Save This Word!

noun

a telescopic device for reflecting the light of a star in a constant direction, the chief component of which is a plane mirror turned by a clock mechanism to correct for the rotation of the earth.

QUIZZES

QUIZ YOURSELF ON PARENTHESES AND BRACKETS APLENTY!

Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!
Question 1 of 7
Let’s start with some etymology: What are the origins of the typographical word “bracket”?

Origin of siderostat

First recorded in 1875–80; sidero-2 + -stat

OTHER WORDS FROM siderostat

sid·er·o·stat·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for siderostat

  • The telescope was housed at the Exhibition in a long gallery pointing due north and south, the siderostat at the north end.

  • The siderostat, twenty-seven feet high, and as many in length, weighed forty-five tons.

  • The movable portion of the roof of the building had been slid back, and the mirror of the siderostat stood bared to the sky.

British Dictionary definitions for siderostat

siderostat
/ (ˈsaɪdərəʊˌstæt) /

noun

an astronomical instrument consisting essentially of a plane mirror driven about two axes so that light from a celestial body, esp the sun, is reflected along a constant direction for a long period of timeSee also heliostat Compare coelostat

Derived forms of siderostat

siderostatic, adjective

Word Origin for siderostat

C19: from sidero-, from Latin sidus a star + -stat, on the model of heliostat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
See Today's Synonym