from The Century Dictionary.

  • A name given to a large number of marine animals included in the subkingdom Cælenterata, and represented chiefly by the Medusidæ and their allies, in popular language known as sea-nettles, sea-blubbers, jelly-fish, etc.
  • A clans of Cælenterata, including medusæ of considerable size, with gastral filaments, endodermal gonads, and lobed umbrella-edge, and without true velum: contrasted with Hydromedusæ and Actinozoa. Same as Acraspeda.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural A group of Cœlenterata, including the Medusæ or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles.


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