sidereal days

A form of sidereal day — 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).

Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

noun
  1. pluralplural of sidereal day
Cite this entry
APA

sidereal days. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/sidereal%20days

MLA

“sidereal days.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sidereal%20days. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “sidereal days,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/sidereal%20days.

Source: sidereal days on Wiktionary, CC BY-SA 4.0.