We found 3 dictionaries that define the word sidereal hours:

General (3 matching dictionaries)

1. sidereal hours: Merriam-Webster
2. sidereal hours: Collins English Dictionary
3. sidereal hours: Vocabulary.com

(Note: See sidereal_hour as well.)

Definitions from WordNet (sidereal hour) ▸ noun:  1/24 of a sidereal day ▸ Also see sidereal_hour ▸ Words similar to sidereal hours ▸ Usage examples for sidereal hours ▸ Idioms related to sidereal hours ▸ Wikipedia articles (New!) ▸ Words that often appear near sidereal hours ▸ Rhymes of sidereal hours ▸ Invented words related to sidereal hours