n. A bronze medal or medallion with a deep furrow on the contour or edge, supposed to have been struck in the days of Constantine and his successors.
the GNU version of the Collaborative International Dictionary of English
n. A species of medal or medallion of bronze, having a deep furrow on the contour or edge; -- supposed to have been struck in the days of Constantine and his successors.
The Century Dictionary and Cyclopedia
Having a furrowed circumference or circular furrow.
n. A coin or medal having such a circumference: a term applied by numismatists to certain Roman copper pieces, which are characterized by having on each side a circular furrow.
Word Usage
"The term contorniate is applied to a large circular copper coin with a raised rim, used principally in connection with the circensian games."