[ ak-tin-ee-uh n ]
/ ækˈtɪn i ən /
belonging or pertaining to the order or suborder Actiniaria, comprising the sea anemones.
any sea anemone.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for actinian
Moreover, there are some modern corals in which the secondary cycle of mesenteries departs from the Actinian plan.