noun ダウンロード 🔗共有 マストドン Extinct elephant-like mammal of the genus Mammut that flourished worldwide from Miocene through Pleistocene times; differs from elephants and mammoths in the form of the molar teeth. Examples : "Paleontologists discovered a well-preserved mastodon skeleton during an excavation. " 古生物学者は発掘調査中に保存状態の良いマストドンの骨格を発見した。 animal history biology geology AIとチャット語彙ゲーム読解練習