Equinox
A Dictionary of Scientific Terms · 1927 · p. 3
The time when the sun cro es the equator, and day and night are of equal length.
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British Encyclopedia (1933)
Adair's New Encyclopedia (1923)
Everybody's Encyelopedia (1912)
Chamber's Twientieth Century Dictionary (1908)
Pears Shilling Cyclopedia (1898)
Illustrated Marine Encyclopedia (1890)
Zell's Condensed Dictionary (1879)
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