equinox

1. (also figuratively) The circumstance of a twenty-four hour time period having the day and night of equal length.Examples: "[D]oe but ſee his vice, / Tis to his vertue, a iuſt equinox, / The one as long as th'other: […]"alsofiguratively

2. (astronomy) One of the two points in space where the apparent path of the Sun intersects with the equatorial plane of the Earth.

3. (obsolete)Examples: "The paſſage yet vvas good, the vvind, 'tis true, / VVas ſomevvhat high, but that vvas nothing nevv, / Nor more than uſual Equinoxes blevv."; "The Equinox drove the sand into their faces or round their legs, as they dived among the sheep-haunted hollows."obsoleterare

4. (obsolete)Examples: "[T]hey [seals] are over all the American Coaſt of the South Seas, from Terra del Fuego, up to the Equinoctial Line: but to the North of the Equinox again, in theſe Sea, I never ſavv any, till as far as 21 North Lat[itude]."Synonyms: equinoctial lineobsolete