Bible Dictionaries
Sidereal

Webster's Dictionary

(1):

(a.) Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day.

(2):

(a.) Relating to the stars; starry; astral; as, sidereal astronomy.

Bibliography Information
Webster, Noah. Entry for 'Sidereal'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/sidereal.html. 1828.