e·vec·tion ( -v k sh n)n. Solar perturbation of the lunar orbit. [Latin  vecti , vectin-, a going up, from vectus, past participle of vehere, to raise up : -, ex-, up from; see ex- + vehere, to carry; see wegh- in Indo-European roots.]e·vec tion·al adj. |
evection [ɪˈvɛkʃən]
n
(Astronomy) irregularity in the moon's motion caused by perturbations of the sun and planets
[from Latin ēvectiō a going up, from ēvehere to lead forth, from vehere to carry]
evectional adj
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