sidereal hour

noun

Definition of sidereal hour

: the 24th part of a sidereal day

First Known Use of sidereal hour

circa 1695


Learn More about sidereal hour


Seen and Heard

What made you want to look up sidereal hour? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!