jellyfish has definitions from the field of zoology
1
[ noun ] (zoology) large siphonophore having a bladderlike float and stinging tentacles

Related terms

siphonophore Physalia

2
[ noun ] (zoology) any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans

Synonyms

medusan medusa

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