Definition of acanthi:
(n) :
(architecture) An ornament resembling the foliage or leaves of Acanthus spinosus, used in the capitals of the Corinthian and composite orders.
(n) :
A member of the genus Acanthus of herbaceous prickly plants with toothed leaves, (family Acanthaceae, order Lamiales (formerly Scrophulariales)) found in the south of Europe, Asia Minor, and India.