Main Entry: or·ga·num

Pronunciation: \ˈȯr-gə-nəm\

Function: noun

Etymology: Medieval Latin, from Latin, organ

Date: 1782

1 : early polyphony of the late Middle Ages that consists of one or more voice parts accompanying the cantus firmus often in parallel motion at a fourth, fifth, or octave above or below; also : a composition in this style
2 : organon