American Heritage Dictionary
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Century Dictionary
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GNU Webster's 1913
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WordNet
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Elsewhere on the web
Platyhelminths - Also known as flatworms, members of this phylum are flattened, soft-bodied invertebrates ranging in size from microscopic to more than 50 feet (15 meters) in length.
Most species that belong to this phylum are parasitic, some of which parasitize animals and humans.

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.
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