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plural iguanodons
Any of several large dinosaurs, of the genus Iguanodon, of the Jurassic and Cretaceous periods. quotations examples
August the twenty-eighth - the day we saw five live iguanodons in a glade of Maple White Land.
1912, Arthur Conan Doyle, The Lost World […], London, New York, N.Y.: Hodder and Stoughton