Definitions

from The Century Dictionary.

  • noun An American genus of extinct reptiles, of the order Sauropterygia, related to the plesiosaurs, but differing in the structure of the pectoral arch.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Paleon.) An extinct, long-necked, marine, cretaceous reptile from Kansas, allied to Plesiosaurus.

Etymologies

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Examples

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