from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A sac attached onto a nectocalyx or swimming bell of specific types of oceanic hydrozoans.

from The Century Dictionary and Cyclopedia

  • n. A sac attached to the swimming-bell or nectocalyx of certain oceanic hydrozoans, as calycophorans, into which the cœnosarc may be retracted. See cut under Diphyidæ.


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