Dictionary of Environmental Health
The time of year when the sun is directly overhead at the equator. These events happen twice per year at around 21 March (the VERNAL equinox) and 23 September (the autumnal equinox).
See also: SOLSTICE
This is the complete article, containing 36 words
(approx. 1 page at 300 words per page).
View More Summaries on Equinox