An identifying crest, emblem, or family insignia often found on the clothes of actors or historical figures
The imperial chrysanthemum, the mon of the reigning family, is used as a national emblem
The most frequent form of the mon is circular, and it commonly consists of conventionalized forms from nature, flowers, birds, insects, the lightnings, the waves of the sea, or of geometrical symbolic figures; color is only a secondary character
Motor octane number One of two ASTM tests for octane measures MON, predicting behavior at high speed operation MON is generally lower than RON See Octane Number