Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun A taxonomic genus within the family Actiniidae — certain sea anemones.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

New Latin, from Ancient Greek ἀκτίς, ἀκτῖν- (actis, actin-, "ray")

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Examples

  • 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.

    Journal of researches into the geology and natural history of the various countries visited by H.M.S. Beagle 2003

  • 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.

    Journal of researches into the geology and natural history of the various countries visited by H.M.S. Beagle 2003

  • Now Actinia tentacles, treated with glycerol, give off their poison into the glycerol and the extract is toxic.

    Charles Richet - Nobel Lecture 1967

  • Further, the second experiment to be adduced against the specificity of anaphylaxis I conducted with two kinds of toxalbumin, extracted from the Actinia, a substance which I named congestin, as its property is to bring on grave congestion of the circulatory system in the intestines and stomach.

    Charles Richet - Nobel Lecture 1967

  • The _Actinia mesembryanthemum_ is the common smooth anemone, abounding on the coast, and often to be found attached to stones on the beach.

    The Atlantic Monthly, Volume 08, No. 47, September, 1861 Various

  • There are many varieties, some of which are very delicate, as the _Actinia anguicoma_, or Snaky-locked Anemone, and the pink and brown

    The Atlantic Monthly, Volume 08, No. 47, September, 1861 Various

  • Here is the sweetest longitudinal section of the tentacle of an _Actinia_, and here -- look at these lovely transverse sections of the plumule of a pea; you can see the primary groups of spiral vessels.

    The Bacillus of Beauty A Romance of To-day Harriet Stark

  • The complete dependence of the evolution of oxygen upon the presence of algæ, and its complete independence of the pigment proper to the animal, were still further demonstrated by exposing as many as possible of those anemones known to contain yellow cells (_Aiptasia chamæleon, Helianthus troglodytes_, etc.) side by side with a large number of forms from which these are absent (_Actinia mesembryanthemum, Sagastia parasitica, Cerianthus_, etc.).

    Scientific American Supplement, No. 324, March 18, 1882 Various

  • The _Actinia gemmacea_, or Gemmed Anemone, the _Actinia crassicornis_, and the Plumose Anemone are all beautiful, but tender varieties.

    The Atlantic Monthly, Volume 08, No. 47, September, 1861 Various

  • Many marine animals seem to have this power of stinging: besides the Portuguese man-of-war, many jelly-fish, and the Aplysia or seaslug 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.

    Chapter XX 1909

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