Noun jellyfish has 2 senses
- Portuguese man-of-war, man-of-war, jellyfish - large siphonophore having a bladderlike float and stinging tentacles
--1 is a kind of siphonophore
--1 is a member of Physalia, genus Physalia
- jellyfish, medusa, medusan - any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
--2 is a kind of coelenterate, cnidarian
--2 is a member of Cnidaria, phylum Cnidaria, Coelenterata, phylum Coelenterata
--2 has particulars: Aegina; Chrysaora quinquecirrha
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