| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
organum (ˈɔːɡənəm) ![]() | |
| —n , pl -na, -nums | |
| 1. | a form of polyphonic music originating in the ninth century, consisting of a plainsong melody with parts added at the fourth and fifth |
| 2. | a variant of organon |
| [C17: via Latin from Greek; see | |
organon or·ga·non (ôr'gə-nŏn') or or·ga·num (-nəm)
n. pl. or·ga·nons or or·ga·nums or or·ga·na (-nə)
An organ.
A set of principles for use in scientific investigation.