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Trematoda 吸虫纲; 吸虫类 吸虫纲; 吸虫类 Trematoda n 1: parasitic flatworms ( including flukes) [ synonym: { Trematoda}, { class Trematoda}] Trematodea \ Trem` a* to" de* a\, n. pl. [ NL., from Gr. ? having holes, from ?, ?, a hole.] ( Zool.) An extensive order of parasitic worms. They are found in the internal cavities of animals belonging to all classes. Many species are found, also, on the gills and skin of fishes. A few species are parasitic on man, and some, of which the fluke is the most important, are injurious parasites of domestic animals. The trematodes usually have a flattened body covered with a chitinous skin, and are furnished with two or more suckers for adhesion. Most of the species are hermaphrodite. Called also { Trematoda}, and { Trematoidea}. See { Fluke}, { Tristoma}, and { Cercaria}. [ 1913 Webster]
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