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hydroid definition

hy·droid (hī′dro̵id′)

adjective

  1. like a hydra or polyp
  2. of or related to an order (Hydroida) of hydrozoans, including the hydras and many colonial marine species

Etymology: hydr(a) + -oid

noun

any hydroid hydrozoan

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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