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mesozoan

[mez-uh-zoh-uh n, mes-, mee-zuh-, -suh-] /ˌmɛz əˈzoʊ ən, ˌmɛs-, ˌmi zə-, -sə-/ Zoology
noun
1.
any member of the phylum Mesozoa.
adjective
2.
of or relating to the mesozoans.
Origin of mesozoan
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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mesozoan in Science
mesozoan
  (měz'ə-zō'ən)   
Any of a variety of very small parasitic marine animals of the group Mesozoa. Mesozoans resemble worms and have simple bodies divided into two layers. The outer layer is covered with cilia, and there are no internal organs. The taxonomic status of the Mesozoa is unclear, as some scientists believe the mesozoans to be an ancient and primitive group and others regard them as degenerate forms of more complex animals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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