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- - Acta Sanctorum
  - actable
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actinian

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WordReference Random House Unabridged Dictionary of American English © 2025

ac•tin•i•an adj.

Invertebratesbelonging or pertaining to the order or suborder Actiniaria, comprising the sea anemones.

n.

Invertebratesany sea anemone.

Neo-Latin Actini(a) actinia + -an
1885–90

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