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Definition of "jellyfish" []

  • Any of numerous usually free-swimming marine coelenterates of the class Scyphozoa, characteristically having a gelatinous, tentacled, often bell-shaped medusoid stage as the dominant phase of its life cycle. (noun)
  • Any of various similar or related coelenterates. (noun)
  • Informal One who lacks force of character; a weakling. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "jellyfish" in a sentence
  • "The term "jellyfish" often is used to denote weakness."
  • "The term "jellyfish" encompasses two different groups: Cnidaria, animals"
  • "From the edge, which emit green light when the jellyfish is agitated, Shimomura isolated a protein."