Mesozoan meaning

mĕz'ə-zō'ən, mĕs'-
Any of various small wormlike animals that are parasites of marine invertebrates and have an inner layer of one or more cells surrounded by an outer layer of ciliated cells.
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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.
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Any worm-like, marine parasite of the phylum Mesozoa.
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Origin of mesozoan

  • From New Latin Mesozōa former phylum name meso– (because the animals were considered to be intermediate between the protozoans and the metazoans in structure) -zōa pl. of -zōon animal –zoon
    From American Heritage Dictionary of the English Language, 5th Edition
  • Mesozoa +"Ž -an
    From Wiktionary