Nectocalyx

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Nectocalyx \Nec`to*ca"lyx\, n.; pl. {Nectocalyces}. [NL., fr.
     Gr. nhkto`s swimming + ? a calyx.] (Zool.)
     (a) The swimming bell or umbrella of a jellyfish of medusa.
     (b) One of the zooids of certain {Siphonophora}, having
         somewhat the form, and the essential structure, of the
         bell of a jellyfish, and acting as a swimming organ.


         [1913 Webster] Nectosac