Definition of actinian in English:


Syllabification: ac·tin·i·an
Pronunciation: /akˈtinēən


  • A sea anemone.
    More example sentences
    • However, actinians, like all coelenterates, capture and digest animal prey with their nematocysts.
    • Even on reefs, most species of host actinians are inconspicuous, unlike their partner fish.
    • The larger, more conspicuous include other species of cold-water coral, actinians and sponges.


mid 18th century: from the modern Latin genus name Actinia (from Greek aktis, aktin- 'ray') + -an.

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