[aw-rek-sis, oh-rek-]
noun Psychology.
the affective and conative character of mental activity as contrasted with its cognitive aspect; the appetitive aspect of an act.

1610–20; < Latin: longing, appetite < Greek órexis desire, equivalent to orég(ein) to desire + -sis -sis

orectic [aw-rek-tik, oh-rek-] , adjective
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