duplum DOO-pluhm Your browser does not support the audio element. [ Latin ] Definition In 12th century organum, the duplum was the part immediately above the tenor. If a third part was present, it was called the triplum. In the 13th century, the duplum came to be known as the motetus. See Also [Latin] motetus Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2013-05-03 18:22:55