Usually means: Sea anemone, a marine invertebrate.
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We found 13 dictionaries that define the word actinian:

General (13 matching dictionaries)
  1. actinian: Merriam-Webster
  2. actinian: Oxford Learner's Dictionaries
  3. actinian: Collins English Dictionary
  4. actinian: Vocabulary.com
  5. actinian: Wordnik
  6. actinian: Wiktionary
  7. actinian: Infoplease Dictionary
  8. actinian: Dictionary.com
  9. actinian: Rhymezone
  10. actinian: FreeDictionary.org
  11. actinian: Mnemonic Dictionary
  12. actinian: TheFreeDictionary.com
  13. actinian: Merriam-Webster

(Note: See actinians as well.)

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Definitions from Wiktionary (actinian)

▸ noun:  A sea anemone (of the order Actiniaria).

Similar:
actinia, actiniarian, actinarian, actiniarid, actinioidean, actiniid, actinostolid, actinizoan, anemone, sea anemone, more...

Opposite:
non-actinian, inactinian, non-anthozoan

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Similar:
actinia, actiniarian, actinarian, actiniarid, actinioidean, actiniid, actinostolid, actinizoan, anemone, sea anemone, more...

Opposite:
non-actinian, inactinian, non-anthozoan



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