contorniate
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contorniate
(kɒnˈtɔːnɪət)adj
(of a coin or medallion) having a circular groove near the edge of the disc, the circumference of which is just smaller than the circumference of the object itself
n
a contorniate coin or medallion
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014