imperial mammoth(n = noun.animal) archidiskidon imperator, imperial elephant - largest known mammoth; of America;
is a kind of mammoth
is a member of archidiskidon, genus archidiskidon

british imperial system, columbian mammoth, crown imperial, imperial, imperial beard, imperial capacity unit, imperial decree, imperial elephant, imperial gallon, imperial japanese morning glory, imperial moth, mammoth, mammoth cave national park, northern mammoth, woolly mammoth