What does equinoctial mean?

Definitions for equinoctial
ˌi kwəˈnɒk ʃəl, ˌɛk wə-equinoc·tial

This dictionary definitions page includes all the possible meanings, example usage and translations of the word equinoctial.

Princeton's WordNet

  1. celestial equator, equinoctial circle, equinoctial line, equinoctialadjective

    the great circle on the celestial sphere midway between the celestial poles

  2. equinoctialadjective

    relating to the vicinity of the equator

  3. equinoctialadjective

    relating to an equinox (when the lengths of night and day are equal)

Wiktionary

  1. equinoctialnoun

    The great circle midway between the celestial poles; the celestial equator.

  2. equinoctialnoun

    The terrestrial equator.

  3. equinoctialadjective

    Of or relating to an equinox.

  4. equinoctialadjective

    Of or relating to a celestial or terrestrial equator.

Samuel Johnson's Dictionary

  1. Equinoctialadjective

    Etymology: from equinox.

    Thrice th’ equinoctial line
    He circled; four times cross’d the car of night
    From pole to pole, traversing each colure. John Milton, Pa. Lost.

    Some say the sun
    Was bid turn reins from th’ equinoctial road,
    Like distant breadth. John Milton, Paradise Lost, b. x.

    In vain they covet shades, and Thracia’s gales,
    Pining with equinoctial heat. Phillips.

  2. Equinoctialnoun

    The line that encompasses the world at an equal distance from either pole, to which circle when the sun comes, he makes equal days and nights all over the globe.

    Etymology: æquus and nox, Latin.

Wikipedia

  1. equinoctial

    A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September.More precisely, an equinox is traditionally defined as the time when the plane of Earth's equator passes through the geometric center of the Sun's disk. Equivalently, this is the moment when Earth's rotation axis is directly perpendicular to the Sun-Earth line, tilting neither toward nor away from the Sun. In modern times, since the Moon (and to a lesser extent the planets) causes Earth's orbit to vary slightly from a perfect ellipse, the equinox is officially defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the apparent geocentric longitude of the Sun is 0° and 180°.The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night). On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. They are not exactly equal, however, because of the angular size of the Sun, atmospheric refraction, and the rapidly changing duration of the length of day that occurs at most latitudes around the equinoxes. Long before conceiving this equality, primitive equatorial cultures noted the day when the Sun rises due east and sets due west, and indeed this happens on the day closest to the astronomically defined event. As a consequence, according to a properly constructed and aligned sundial, the daytime duration is 12 hours. In the Northern Hemisphere, the March equinox is called the vernal or spring equinox while the September equinox is called the autumnal or fall equinox. In the Southern Hemisphere, the reverse is true. During the year, equinoxes alternate with solstices. Leap years and other factors cause the dates of both events to vary slightly.Hemisphere-neutral names are northward equinox for the March equinox, indicating that at that moment the solar declination is crossing the celestial equator in a northward direction, and southward equinox for the September equinox, indicating that at that moment the solar declination is crossing the celestial equator in a southward direction.

ChatGPT

  1. equinoctial

    Equinoctial generally refers to the time or event when the sun crosses the celestial equator, occurring around March 21 and September 23 each year. It is the period when the day and night are approximately equal in length, marking the start of spring and autumn. The term can also refer to anything relating to an equinox or occurring at the equinox, or to the celestial equator itself.

Webster Dictionary

  1. Equinoctialadjective

    pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line

  2. Equinoctialadjective

    pertaining to the regions or climate of the equinoctial line or equator; in or near that line; as, equinoctial heat; an equinoctial sun

  3. Equinoctialadjective

    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

  4. Equinoctialnoun

    the equinoctial line

  5. Etymology: [L. aequinoctials, fr. aequinoctium equinox: cf. F. quinoxial. See Equinox.]

Dictionary of Nautical Terms

  1. equinoctial

    Synonymous with equator (which see).

How to pronounce equinoctial?

How to say equinoctial in sign language?

Numerology

  1. Chaldean Numerology

    The numerical value of equinoctial in Chaldean Numerology is: 1

  2. Pythagorean Numerology

    The numerical value of equinoctial in Pythagorean Numerology is: 9

Popularity rank by frequency of use

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"equinoctial." Definitions.net. STANDS4 LLC, 2024. Web. 16 Apr. 2024. <https://www.definitions.net/definition/equinoctial>.

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