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[From New Latin Platyhelminthēs, phylum name : platy- + Greek helmīs, helminth-, parasitic 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.
(Animals) any invertebrate of the phylum Platyhelminthes (the flatworms)
[C19: from New Latin Platyhelmintha flatworm, from platy- + Greek helmins worm]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
plat•y•hel•minth(ˌplæt ɪˈhɛl mɪnθ)
any of various unsegmented worms of the phylum Platyhelminthes, with a soft, flattened body, including the tapeworm, planarian, and trematode. Also called flatworm.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||platyhelminth - parasitic or free-living worms having a flattened body|
flame cell - organ of excretion in flatworms
worm - any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
planaria, planarian - free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts
trematode, trematode worm, fluke - parasitic flatworms having external suckers for attaching to a host
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