We found 10 dictionaries that define the word sidereal hour:

General (10 matching dictionaries)

1. sidereal hour: Merriam-Webster
2. sidereal hour: American Heritage Dictionary of the English Language
3. sidereal hour: Collins English Dictionary
4. sidereal hour: Vocabulary.com
5. sidereal hour: Wordnik
6. sidereal hour: Dictionary.com
7. sidereal hour: Rhymezone
8. sidereal hour: FreeDictionary.org
9. sidereal hour: Mnemonic Dictionary
10. sidereal hour: TheFreeDictionary.com

(Note: See sidereal_hours as well.)

Definitions from WordNet (sidereal hour) ▸ noun:  1/24 of a sidereal day Phrases: sidereal hour angle, more... ▸ Words similar to sidereal hour ▸ Usage examples for sidereal hour ▸ Idioms related to sidereal hour ▸ Wikipedia articles (New!) ▸ Words that often appear near sidereal hour ▸ Rhymes of sidereal hour ▸ Invented words related to sidereal hour