معنی کلمه :‌ sidereal

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

Filled with water; soft with moisture; sodden; soaked; wet; as, soggy land or timber.

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.