1. equinoctial - Noun
2. equinoctial - Adjective
Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line.
Pertaining to the regions or climate of the equinoctial line or equator; in or near that line; as, equinoctial heat; an equinoctial sun.
Pertaining to the time when the sun enters the equinoctial points; as, an equinoctial gale or storm, that is, one happening at or near the time of the equinox, in any part of the world.
The equinoctial line.
Source: Webster's dictionary"Greater" astronomical years Equinoctial cycle The Great Year, or equinoctial cycle, corresponds to a complete revolution of the equinoxes around the ecliptic. Source: Internet
A tropical year, also known as a solar year, an astronomical year, or an equinoctial year, is, on average, approximately 365 days, 5 hours, 48 minutes and 45 seconds long (365.24219 days). Source: Internet
See Length of equinoctial day and night for further discussion. Source: Internet
These hours were sometimes referred to as equal or equinoctial hours. Source: Internet
‘Two large stones also stand almost due east and west to mark the local equinoctial positions of the sun.’ Source: Internet