Gideon Algernon Mantell gi·deo·nal·gernonmantell uncommon noun 1. English geologist remembered as the first person to recognize that dinosaurs were reptiles (1790-1852) SynonymsMantellGideon Algernon Mantell Related words Broader terms geologist WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
