Dictionary
Find
in
Dictionary
Thesaurus
Translations

Click to move up the list of words
equestrienne
equi-
equiangular
equid
equidimensional
equidistant
equilateral
equilibrant
equilibrate
equilibrist
equilibrium
equilibrium constant
equilibrium price
equilibrium quantity
equilibrium rate of interest
equilibrium unemployment
equimolar
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

equinox

e·qui·nox [ kwə nòks, ékwə nòks ] (plural e·qui·nox·es)


noun 
Definition:
 
1. time of equal day and night: either of the two annual crossings of the equator by the Sun, once in each direction, when the length of day and night are approximately equal everywhere on Earth. The equinoxes occur around March 21 and September 23.

2. astronomy 
Same as  equinoctial point


[14th century. Directly or via French< Latin aequinoctium "equal night" < nox "night"]
Advertisement

© 2009 Microsoft