was the title of officers who commanded a trireme
in the classical Greek world. In Athens
and a few other states this officer was also required to pay for the outfitting and maintenance of the ship. Trierarchs thus had to be men of considerable means, since the expenses incurred could run as high as a talent
in the course of a year. Indeed, by the late 4th century BC, trierarchs in Athens often shared responsibility for a single ship, as the financial burden of the job had become too great.
- Hornblower, Simon, and Anthony Spawforth ed., The Oxford Classical Dictionary (Oxford University Press, 2003) ISBN 0-19-866172-X