SINCE 1828
actinia
noun
ac·tin·ia
| \ ak-ˈti-nē-ə\
Definition of actinia
1
capitalized,
in some classifications
: a genus of sea anemones nearly coextensive with the order Actiniaria
2
plural actiniae\ ak-ˈti-nē-ˌē\
or actinias
: any sea anemone or related animal
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