- a major grouping (formerly a phylum) of small-to-microscopic pseudocoelomate organisms, as the rotifers, nematodes, and gastrotriches, all of which are now classified as separate phyla.
Origin of Aschelminthes
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for aschelminthes
The invertebrates: Acanthocephala, Aschelminthes, and Endoprocta.The Biotic Associations of Cockroaches
Louis M. Roth
- A phylum of the Metazoa that includes nematodes and other roundworms that are nonsegmented, bilaterally symmetrical, and cylindrical in form, with a pseudocele body cavity and rounded or pointed ends.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.