Sentence:  At first there were three pay levels: sexagenarian (sixty thousand sesterces), centernarian (one hundred thousand sesterces), and duocenarian (two hundred thousand sesterces). At the end of the second century a fourth level was added, <WSD>tricenarian</WSD> (three hundred thousand sesterces). The procurators never went higher than duocenarian; the directors of imperial offices, originally at the duocenarian level, were raised to <WSD>tricenarian</WSD>. 
Meaning of the word marked with <WSD> tags:  The highest rank and pay grade for prefectures in Ancient Rome