Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Any of various mostly microscopic wormlike invertebrates of the obsolete phylum Aschelminthes, including the nematodes, rotifers, and gastrotrichs.
[From New Latin Aschelminthēs, former phylum name : Greek askos, bag (in reference to the pseudocoel found in members of the group) + helmins, helminth-, worm; see wel- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
any invertebrate of a former phylum, the Aschelminthes, including rotifers, nematodes, and gastrotrichs, all of which are now classified as separate phyla.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.