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Meaning of orexis

o•rex•is

Pronunciation: (ô-rek'sis, ō-rek'-), [key]
— n. Psychol.
  1. the affective and conative character of mental activity as contrasted with its cognitive aspect; the appetitive aspect of an act.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.