jellyfish

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noun jel·ly·fish \ˈje-lē-ˌfish\

Definition of jellyfish

  1. 1 a :  a free-swimming marine coelenterate that is the sexually reproducing form of a hydrozoan or scyphozoan and has a nearly transparent saucer-shaped body and extensible marginal tentacles studded with stinging cells b :  siphonophore c :  ctenophore

  2. 2 :  a person lacking backbone or firmness

Examples of jellyfish in a sentence

  1. <a jellyfish who was afraid to tell her boss that her latest brainstorm was just plain bad>

Illustration of jellyfish

1841

First Known Use of jellyfish

1841


JELLYFISH Defined for English Language Learners

jellyfish

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noun jel·ly·fish \ˈje-lē-ˌfish\

Definition of jellyfish for English Language Learners

  • : a sea animal that has a very soft body and that can sting


JELLYFISH Defined for Kids

jellyfish

play
noun jel·ly·fish \ˈje-lē-ˌfish\

Definition of jellyfish for Students

  1. :  a free-swimming sea animal related to the corals that has a nearly transparent jellylike body shaped like a saucer and tentacles with stinging cells


Medical Dictionary

jellyfish

play
noun jel·ly·fish \ˈjel-ē-ˌfish\

Medical Definition of jellyfish

  1. :  a free-swimming marine coelenterate that is the sexually reproducing form of a hydrozoan or scyphozoan and has a nearly transparent saucer-shaped body and extensible marginal tentacles studded with stinging cells



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