equidiurnal

English

Etymology

equi- +‎ diurnal

Pronunciation

• IPA^(key): /ˌɛkwɪdaɪˈɜː(ɹ)nəl/, /ˌiːkwɪdaɪˈɜː(ɹ)nəl/

Adjective

equidiurnal (not comparable)

1. Pertaining to the time of equal day and night; applied to the equinoctial line.
   • 1837, William Whewell, History of the Inductive Sciences:

     The circle which the sun describes in his diurnal motion, when the days and nights are equal, the Greeks called the equidiurnal

References

“equidiurnal”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.