a combining form meaning “divination,” of the kind specified by the initial element: necromancy.
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British Dictionary definitions for -mancy
n combining form
indicating divination of a particular kindchiromancy
Word Origin for -mancy
from Old French -mancie, from Latin -mantia, from Greek manteia soothsaying
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
Word Origin and History for -mancy
word-forming element meaning "divination by means of," from Old French -mancie, from Late Latin -mantia, from Greek manteia "oracle, divination," from mantis "seer, prophet, soothsayer," related to mania "madness, frenzy" (see mania).
Online Etymology Dictionary, © 2010 Douglas Harper