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in some classifications, a phylum including the Acanthocephala and Nematoda.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Formerly considered a phylum to incorporate the pseudocelomate organisms, which now are divided into the distinct phyla Acanthocephala, Entoprocta, Rotifera, Gastrotricha, Kinorhyncha, Nematoda, and Nematomorpha.
[nemat- + G. helmins, helminthos, worm]
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