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equi- +‎ diurnal


equidiurnal (not comparable)

  1. Pertaining to the time of equal day and night; applied to the equinoctial line.
    (Can we find and add a quotation of Whewell to this entry?)

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for equidiurnal in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)