单词 | mesozoan |
释义 | mes·o·zo·an (mĕz′ə-zōən, mĕs′-) n. 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. [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; see -ZOON.] |
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