jellyfish

jellyfish definition - medical

jel·ly·fish (jĕlˈē-fĭshˌ)

noun pl. jellyfish or jel·ly·fish·es
  1. Any of numerous marine coelenterates of the class Scyphozoa, some poisonous species of which, notably the Portuguese man-of-war, produce a toxin that can be injected into the skin by nematocysts on the tentacles, causing linear wheals.
  2. Any of various similar or related coelenterates.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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