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actinia

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ac·tin·i·a  (k-tn-) also ac·tin·i·an (-n)
n. pl. ac·tin·i·ae (--) also ac·tin·i·ans
A sea anemone or a related animal.
[New Latin Actnia, genus name, from Greek akts, aktn-, ray; see actino-.]
actinia [ækˈtɪnɪə]
n pl -tiniae [-ˈtɪnɪˌiː], -tinias
(Life Sciences & Allied Applications / Animals) any sea anemone of the genus Actinia, which are common in rock pools
[New Latin, literally: things having a radial structure. See actino-, -ia]
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.actiniaActinia - a genus of sea anemone common in rock pools
genus Actinia
coelenterate genus - a genus of coelenterates
Actinaria, Actiniaria, order Actinaria, order Actiniaria - sea anemones
2.actiniaactinia - any sea anemone or related animal    
actinian, actiniarian
Actinaria, Actiniaria, order Actinaria, order Actiniaria - sea anemones
sea anemone, anemone - marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton


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Many marine animals seem to have this power of stinging: besides the Portuguese man-of-war, many jelly-fish, and the Aplysia or sea-slug of the Cape de Verd Islands, it is stated in the voyage of the Astrolabe, that an Actinia or sea-anemone, as well as a flexible coralline allied to Sertularia, both possess this means of offence or defence.
The Voyage of the Beagle by Darwin, Charles View in context
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