This shows grade level based on the word's complexity.
sidereal
[ sahy-deer-ee-uhl ]
/ saɪˈdɪər i əl /
See the most commonly confused word associated with sidereal
Save This Word!
This shows grade level based on the word's complexity.
adjective Astronomy.
determined by or from the stars: sidereal time.
of or relating to the stars.
COMPARE MEANINGS
Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?
Origin of sidereal
1625–35; <Latin sīdere(us) of, belonging to the stars (sīder-, stem of sīdus star, constellation + -eus adj. suffix) + -al1
OTHER WORDS FROM sidereal
si·de·re·al·ly, adverbnon·si·de·re·al, adjectiveun·si·de·re·al, adjectiveWords nearby sidereal
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use sidereal in a sentence
British Dictionary definitions for sidereal
sidereal
/ (saɪˈdɪərɪəl) /
adjective
of, relating to, or involving the stars
determined with reference to one or more starsthe sidereal day
Derived forms of sidereal
sidereally, adverbWord Origin for sidereal
C17: from Latin sīdereus, from sīdus a star, a constellation
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
Scientific definitions for sidereal
sidereal
[ sī-dîr′ē-əl ]
Relating to the stars or constellations.
Measured with respect to the background of fixed stars instead of the Sun.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.