actinia
noun
a sea anemone, especially of the genus Actinia.
The grammatical form denoting more than one person, place, thing, or idea.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Sea anemones, in English, I believe," said the Doctor, "actinias, serpulas, and sabellas.
From Recollections of Geoffrey Hamlyn by Henry Kingsley