Sciuromorpha sciu·ro·morpha uncommon noun 1. large more or less primitive rodents: squirrels; marmots; gophers; beavers; etc. Synonymssuborder Sciuromorpha Related words Broader terms animal order Parts Rodentia Part of HeteromyidaeGeomyidaeSciuridaeCastoridaeAplodontiidae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.