01 a. Pertaining to the time of equal day and night; -- applied to the equinoctial line.
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1.
Pertaining to the time of equal day and night; -- applied to the equinoctial line.
Entry
1 sense
Webster, 1913
Equidiurnal
· E·qui·di·ur·nal
· IPA /ˌɛkwɪdaɪˈɜː(ɹ)nəl/