from the GNU version of the Collaborative International Dictionary of English

  • An order of Siphonophora, furnished with an air sac, or float, and a series of nectocalyces. See Illust. under nectocalyx.

from The Century Dictionary and Cyclopedia

  • n. An order of siphonophorous oceanic hydrozoans, having the proximal end modified into a float or pneumatophore (as distinguished from a somatocyst).


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