evectionaladj.
/ᵻˈvɛkʃn̩(ə)l/, /ᵻˈvɛkʃən(ə)l/, U.S. /əˈvɛkʃ(ə)nəl/, /iˈvɛkʃ(ə)nəl/ Astronomy.
Of or relating to the evection of the moon (evection n. 2a).
ΚΠ
1877 Rep. Brit. Assoc. Advancem. Sci. 1876 303 For other seas than the North Atlantic, the evectional and variational constituents of the two chief lunar diurnal tides represented by the first and last terms..may be quite sensible.
1905 Lick Observatory Bull. 3 134/2 It may be stated that the evectional inequality alone will produce a maximum geocentric displacement of the satellite of over three minutes of arc.
2007 Jrnl. Coastal Res. 23 529/2 I have to introduce a new period, the evectional month Meve= 31.811939 days.
This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022).
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adj.1877