onychomancy (??n?k???mæns?) na form of divination through use of the fingernailsCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014onychomancya form of divination involving examination of the fingernails.See also: Divinationthe art of divination through inspection of the fingernails. ? onychomantic, adj.See also: Fingers and Toes-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.