in antiquity, an officer in the Roman army, who had the command of 2000 men.

The emperors had also ducenarii among their procurators or intendants, called procuratores ducenarii. Some say, that these were such whose salary was two hundred sesterces; as in the games of the circus, horses hired for two hundred sesterces were called ducenarii. Others hold, that ducenarii were those who levied the two hundredth penny, the officers appointed to inspect the raising of that tribute. In the inscription at Palmyra, the word ducenarius, in Greek δυσεναριος, occurs very often.