[ih-vek-shuh n]

noun Astronomy.

a periodic irregularity in the moon's motion, caused by the attraction of the sun.

Origin of evection

1650–60; < Latin ēvectiōn- (stem of ēvectiō) a going upwards, flight, equivalent to ēvect(us) (past participle of ēvehere to carry forth, move forth) + -iōn- -ion
Related formse·vec·tion·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for evection

Historical Examples of evection

  • This he called the evection, and introduced another epicycle to represent it.


    Walter W. Bryant

  • His chief discovery was an irregularity of the lunar motion, called the ‘evection.’

British Dictionary definitions for evection



irregularity in the moon's motion caused by perturbations of the sun and planets
Derived Formsevectional, adjective

Word Origin for evection

C17: from Latin ēvectiō a going up, from ēvehere to lead forth, from vehere to carry
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012