What does "actiniarian" mean?

Any sea anemone of the order Actiniaria

What is a synonym for "actiniarian"?

Common synonyms include: actinia, actinian.

Pronounced //ækˌtɪniˈɛəɹi.ən//.

/ækˌtɪniˈɛəɹi.ən/ noun

noun ·Rare ·Advanced level

Noun

From translingual Actiniaria + -an.