American mastodon ame·ri·can·mastodon uncommon noun 1. North American mastodon; in some classifications considered a mammoth rather than a mastodon SynonymsAmerican mastodonAmerican mastodontMammut americanum Related words Word family American mastodont Broader terms mastodon Parts Mammut WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
