sidereal

1. 1.

   of or relating to the stars or constellations

   “sidereal bodies”

   “the sidereal system”
2. 2.

   (of divisions of time) determined by daily motion of the stars

   “sidereal time”

   Antonymscivil

Questions about sidereal

What does sidereal mean?

sidereal means "of or relating to the stars or constellations". That is the primary sense; the word has 2 in total, listed in full on this page.

How many syllables are in sidereal?

sidereal has 4 syllables: si-de-re-al. The stress falls on "de".

What is the opposite of sidereal?

The recorded antonyms are civil.

Is sidereal a common word?

sidereal is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.