Speakur

Word Pronunciation & Dictionary

sidereal day

Word Rarity Very rare

Frequency: Zipf frequency 2.21 in modern English

Syllables
side-re-al -day
IPA
16
Scrabble Score
11
Letters
4
Syllables
8
Unique Chars

Meaning

noun

One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).

noun

The rotational period of Earth; the time in which Earth rotates around its axis 360 degrees.

Inflected Forms

sidereal days (plural)

Phrases

stellar day solar day

Frequently Paired Words

stellar day solar day

Synonyms

day

Questions

What does sidereal day mean?
One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).

How to pronounce sidereal day

  1. Open the pronunciation page — Open the Speakur entry for “sidereal day”.
  2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
  3. Play the audio — Click Play to hear reference audio for “sidereal day”.
  4. Repeat and practice — Say “sidereal day” aloud, matching stress and vowels until it feels natural.