Dictionary > Equinoctial


1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line.
2. Pertaining to the regions or climate of the equinoctial line or equator; in or near that line; as, equinoctial heat; an equinoctial sun.
3. 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.
(Science: astronomy) equinoctial colure, the celestial equator; so called because when the sun is on it, the nights and days are of equal length in all parts of the world. See equator. ”Thrice the equinoctial line He circled.
(Science: astronomy)” (Milton) – equinoctial points reckoned in any year from the instant when the mean sun is at the mean vernal equinoctial point.
Origin: L. Aequinoctials, fr. Aequinoctium equinox: cf. F. Equinoxial. See Equinox.

You will also like...

Energy pyramid
Freshwater Community Energy Relationships – Producers & Consumers

This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

running freshwater community
Running Water Freshwater Community Factors

This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

Homo Species
The Homo Species

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

human respiratory system

The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

Birth Control and Contraception
Birth Control and Contraception

Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..


Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..