nectocalyx definition

  • noun:
    • The cycling bell or umbrella of a jellyfish or medusa.
    • among the zooids of particular Siphonophora, having somewhat the proper execution, additionally the essential structure, associated with the bell of a jellyfish, and acting as a swimming organ.
    • The swimming bell or umbrella of a jellyfish of medusa.
    • the zooids of certain Siphonophora, having notably the shape, and essential framework, of this bell of a jellyfish, and acting as a swimming organ.
    • A swimming-bell; the bell-shaped or discoidal natatory organ with which many hydrozoans are given, by means of which the hydrosome is propelled through the liquid.

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