LATIN DICTIONARYLexicon Latīnum
noun · neutersecond declension

aequinoctium

aequinoctium n (genitive aequinoctiī or aequinoctī)
Classical[ae̯.kʷɪˈnɔk.ti.ũː]Ecclesiastical[e.kʷiˈnɔk.t͡si.um]

Meaning

  1. neuterequinox

Latīnē defined in Latin in our graded readers

Declension

declension
formsingularplural
nominativeaequinoctiumaequinoctia
genitiveaequinoctiī
aequinoctī		aequinoctiōrum
dativeaequinoctiōaequinoctiīs
accusativeaequinoctiumaequinoctia
ablativeaequinoctiōaequinoctiīs
vocativeaequinoctiumaequinoctia

aequĭnoctĭum, i, n. aequus-nox,
I. the time of equal days and nights, the equinox, Cic. Att. 12, 28, 3; Caes. B. G. 4, 36; cf. id. ib. 5, 23, Varr. L. L. 6, § 8 Müll.: autumnale, Liv 31, 47: vernum, id. 33, 3: aestus duobus aequinoctiis maxime tumentes et autumnali amplius quam verno, etc., Plin. 2, 97, 99, § 215.

Origins

  1. Proto-Italic*aikʷos?
  2. Old Latinaiquos
  3. Latinaequinoctium

Proto-Indo-European *nókʷts Proto-Italic *nok⁽ʷ⁾ts Latin nox Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -iusnom. Latin -ium Latin aequinoctium From aequus + nox + -ium.

Descendants
  • Italianequinozio
  • Frenchéquinoxefrom Old French equinoce
  • Englishequinoxfrom Old French equinoce
  • Portugueseequinócio
  • Spanishequinoccio
  • GermanÄquinoktium
  • Romanianechinocțiu
  • Middle Englishequinoccium
  • Middle Englishequinoxium
  • Middle Englishequenoxium

In English words that came into English from aequinoctium

  • equinoxēquinoxium
  • equinoctialaequinoctiālis

Quick answers

What does aequinoctium mean in Latin?
aequinoctium, a noun, means “equinox”.
What is the genitive of aequinoctium?
The genitive singular is aequinoctiī. aequinoctium is neuter, second declension.
How do you pronounce aequinoctium?
In classical Latin, [ae̯.kʷɪˈnɔk.ti.ũː]; in ecclesiastical (church) Latin, [e.kʷiˈnɔk.t͡si.um].
Where does aequinoctium come from?
Proto-Italic *aikʷos? → Old Latin aiquos → Latin aequinoctium.