Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of trionychoidea is as below...

Trionychoidea :: Trionychoidea (n. pl.) A division of chelonians which comprises Trionyx and allied genera; -- called also Trionychoides, and Trionychina..

Potamian :: Potamian (n.) A river tortoise; one of a group of tortoises (Potamites, or Trionychoidea) having a soft shell, webbed feet, and a sharp beak. See Trionyx..

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