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- noun Plural form of
Sorry, no etymologies found.
He would as soon have thought of passing by one of Harris's plesiosaurians ninety feet long.
I know that this must be so, because I have seen a new photograph of him in the public prints within the last month or so, and in that picture his aspects are distinctly and strikingly geological, and one can see he is thinking about the mastodons and plesiosaurians that he used to play with when he was young.