Definition of Cnidaria in English:
A phylum of aquatic invertebrate animals that comprises the coelenterates.
- 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.
Definition of Cnidaria in:
- US English dictionary
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