Definition of jellyfish
English to English noun - large siphonophore having a bladderlike float and stinging tentacles
source: WordNet 3.0 - any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
source: WordNet 3.0 - Any one of the acalephs, esp. one of the larger species, having a jellylike appearance. See Medusa.
source: Webster 1913
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