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  • WordNet 3.6
    • n Turbellaria free-living flatworms
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Webster's Revised Unabridged Dictionary
    • n. pl Turbellaria (Zoöl) An extensive group of worms which have the body covered externally with vibrating cilia. It includes the Rhabdocœla and Dendrocœla. Formerly, the nemerteans were also included in this group.
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Century Dictionary and Cyclopedia
    • turbellaria A class of worms, or an order of flatworms, characterized by the ciliation of the body, by means of which they set up little currents or vortices of water; the whirl-worms. The name was given in 1831 by Ehrenberg to worms which had long been known as planarians (see Planarida), and was a mere substitute for or synonym of the earlier designation. It has been used with various extensions and restrictions, and has included the nemerteans or so-called rhynchocœlous turb ellarians (see Nemertea). These are now excluded, and the Turbellaria, as an order of flatworms, are those whose body is ciliated and which have a mouth and with few exceptions an alimentary canal, but no anus. Most of them fall in the two main divisions of rhabdocœlous and dendrocœlous turbellarians, according to the simple or branched condition of the alimentary canal. They are mainly free-swimming worms, some of microscopic size, others several inches long; some forms inhabit fresh and others salt water. See cuts under Dendrocœta, Rhabdocœla, and Rhynchocœla.
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Chambers's Twentieth Century Dictionary
    • Turbellaria tur-be-lā′ri-a a class of flat-worms with ciliated skin—the same as Planaria (q.v.)
    • ***


Webster's Revised Unabridged Dictionary
NL., dim. fr. L. turbo, a whirling


In literature:

In the turbellaria we find for the first time a true body-wall distinct from underlying organs.
"The Whence and the Whither of Man" by John Mason Tyler
They developed out of the turbellaria of the sixth stage by forming a true body cavity (a coelom) and blood in their interior.
"Was Man Created?" by Henry A. Mott
Those that are usually dwelt on are treated with the Rotifers and Nematoda and Turbellaria.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5" by Various
They developed out of the Turbellaria of the sixth stage by forming a true body-cavity (a coelom) and blood in their interior.
"The History of Creation, Vol. II (of 2)" by Ernst Haeckel