Obs. rare. Pl. equinoctia, -ums. Also 5 equenoxium, 6–7 æquinoctium. [L. æquinoctium, f. æquus equal + nox, noctis night.] Equinox; (the original form in which the word was adopted).
c. 1400. Maundev., xvii. (1839), 183. [At Jerusalem] … a spere that is pight in to the erthe, vpon the hour of mydday whan it is Equenoxium … scheweth no schadwe.
1563. Shute, Archit., B iij b. He should directly know … that, whiche they call Equinoctium, and Solsticium.
1607–12. Bacon, Ess. Sedit. & Troub. (Arb.), 390. Natural Tempestes are greatest about the æquinoctia.
a. 1625. Fletcher, Nice Valour, I. i. Give me a man … Has a good stroke at tennis … Can play at æquinoctium with the line.
1688. R. Holme, Armoury, II. 16/1. The Colure of the Equinoctiums, or Equinoxes.
