This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Plural form of mastodon.

"Other than the light from the long rectangular lamp that bathed his desk in yellow, beyond was shadow and then beyond it blackness, and far into the main hall near the skeletons of the mastodons was a ceiling light, but it shone more like a beacon than a source of illumination."

cave bear    rhino    muckraker    plesiosaurus    rhinoceros