Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of siphonophore is as below...

Pneumatocyst :: Pneumatocyst (n.) A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia..

Polypite :: Polypite (n.) One of the feeding zooids, or polyps, of a coral, hydroid, or siphonophore; a hydranth. See Illust. of Campanularian..

Siphonophore :: Siphonophore (n.) One of the Siphonophora.

Physograde :: Physograde (n.) Any siphonophore which has an air sac for a float, as the Physalia..

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