1. Large siphonophore having a bladderlike float and stinging tentacles
   - Portuguese man-of-war, man-of-war, man-o'-war 
2. Any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans

Derived forms: jellyfishes

Type of: cnidarian, coelenterate, siphonophore

Part of: Cnidaria, Coelenterata, genus Physalia, phylum Cnidaria, phylum Coelenterata, Physalia

Encyclopedia: Jellyfish Jellyfish, LLC

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