inheres in material entity material entity material to be added role prosthetic role Bill Duncan / Alan Ruttenber 12/16/2014: Prosthics may be either functional for non-functional. For example, a glass eye bears a prosthetic role, but it does not see. Bill Dunan A material to be added role that inheres in a material entity that replaces some missing body part. A glass eye (see http://en.wikipedia.org/wiki/Ocular_prosthesis) A prothetic hand (see http://bebionic.com) Alan Ruttenberg