Definition of Platyhelminthes in English:

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Pronunciation: /ˌplatɪhɛlˈmɪnθiːz/

plural noun

A phylum of invertebrates that comprises the flatworms.
Example sentences
  • Like other members of the phylum Platyhelminthes, those of the class Turbellaria are dorsoventrally compressed, with high surface area to volume ratios.
  • However, opinions do differ for the scoring of three phyla in particular: Platyhelminthes, Nemertea, and Rotifera (variously scored as primitively possessing or lacking a prototroch).
  • The simplest animals that are bilaterally symmetrical and triploblastic (composed of three fundamental cell layers) are the Platyhelminthes, the flatworms.


Modern Latin (plural), from platy- 'flat' + Greek helminth 'worm'.

For editors and proofreaders

Line breaks: Platy|hel¦min¦thes

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