Definify.com
Webster 1913 Edition
Organum
{ ‖
Or′ga-non
, ‖Or′ga-num
, }Noun.
An organ or instrument; hence, a method by which philosophical or scientific investigation may be conducted; – a term adopted from the Aristotelian writers by
Lord Bacon
, as the title (“Novum Organon”) of part of his treatise on philosophical method. Sir. W. Hamilton.