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English definition of “vernal equinox”

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vernal equinox

noun [C usually singular] uk   us  
the time in the spring when the sun crosses the equator, and when night and day are of equal length
Translations of “vernal equinox”
in Chinese (Traditional) 春分…
in Chinese (Simplified) 春分…
(Definition of vernal equinox from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of vernal equinox?
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