Idolum means an insubstantial image or a fallacy. It comes from the Latin word for apparition or religious idol. It can also refer to: ... Found on http://en.wikipedia.org/wiki/Idolum
I·do'lumI*do'lon noun ; plural Idola . [ Latin See Idol ; confer Eidolon .] Appearance or image; a phantasm; a spectral image; also, a mental image or idea. Found on http://www.encyclo.co.uk/webster/I/6
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