English Lexicon

Evection

/ɪˈvɛk.ʃən/
nounCEFR C2 (Proficient)Top #95000 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The largest inequality or irregularity of the moon's motion, caused by the varying attraction of the sun, which affects its orbit and longitude.

    "Astronomers must meticulously calculate evection to accurately predict the moon's position relative to the Earth."
  2. 2

    A formal or archaic medical term denoting carriage, lifting, or a feeling of physical relief and evacuation.

    "Early medical texts occasionally referenced evection as a purgative relief of bodily humors."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Latin word 'evectio', meaning 'a carrying out' or 'elevation', from 'evehere' (to carry out, exalt). Introduced into English astronomy by Ismael Boulliau in the 17th century, adapting Ptolemy's ancient Greek concept 'proslepsis' or lunar anomaly regarding the largest inequality of the moon's motion.

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