equidiurnal

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/ˌɛkwɪdaɪˈɜː(ɹ)nəl//ˌiːkwɪdaɪˈɜː(ɹ)nəl/

adjective

Pertaining to the time of equal day and night; applied to the equinoctial line.

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Meanings

adjectiveequidiurnal (not comparable)
  1. not comparablePertaining to the time of equal day and night; applied to the equinoctial line.

    The circle which the sun describes in his diurnal motion, when the days and nights are equal, the Greeks called the equidiurnal

    1837, William Whewell, History of the Inductive Sciences

Origin

From equi- + diurnal.

Full word history & related roots →
Cite this entry
APA

equidiurnal. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/equidiurnal

MLA

“equidiurnal.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/equidiurnal. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “equidiurnal,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/equidiurnal.

Source: equidiurnal on Wiktionary, CC BY-SA 4.0.