idolum, idolon 1. An appearance or image; a phantasm; a spectral image. 2. A mental image or idea. Related religious-word units: church; dei-, div-; ecclesi-; fanati-; hiero-; -olatry; theo-; zelo-. Related image, likeness, figure unit: icon-. Found on http://www.wordinfo.info/words/index/info/view_unit/1048/2