Breadcrumb Home > Dictionary > Index A actinia: Meaning and Definition of Find definitions for: ac•tin•i•a Pronunciation: (ak-tin'ē-u), [key] — pl. -tin•i•ae -tin•i•as. a sea anemone, esp. of the genus Actinia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: actinia (Thesaurus) acting area actinian TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: ennui Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language