Definition of Cnidaria in English:

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Pronunciation: /(k)nʌɪˈdɛːrɪə/

plural noun

A phylum of aquatic invertebrate animals that comprises the coelenterates.
Example sentences
  • By this usage, the basal metazoans comprise just four phyla (Placozoa, Porifera, Cnidaria, and Ctenophora) and the large clade Bilateria.
  • Four phyla (Placozoa, Porifera, Cnidaria, and Ctenophora) are typically thought to have an ancient origin within Metazoa.
  • Despite these attempts, relationships among Bilateria, Cnidaria, Ctenophora, Placozoa, and Porifera remain obscure.


Modern Latin (plural), from Greek knidē 'nettle'.

For editors and proofreaders

Line breaks: Cni|daria

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