Plural megatheriums or megatheria
A large, extinct ground sloth of the genus Megatherium that lived from the Miocene through the Pleistocene Epochs, primarily in South America. It was as large as an elephant, had long curved claws and teeth only in the sides of its jaws, and ate plants. The megatherium was more closely related to the modern two-toed sloth than to the three-toed sloth.


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    [meg-uh-thurm] /ˈmɛg əˌθɜrm/ noun 1. a plant requiring a constant high temperature and abundant moisture for growth.

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    [meg-uh-dohs] /ˈmɛg əˌdoʊs/ noun 1. a many times the usual amount, as of a vitamin or drug. /ˈmɛɡəˌdəʊs/ noun 1. a very large dose, as of a medicine, vitamin, etc megadose meg·a·dose (měg’ə-dōs’) n. An exceptionally large dose, as of a drug or vitamin.

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    [mak-ruh-don-shuh, -shee-uh] /ˌmæk rəˈdɒn ʃə, -ʃi ə/ noun 1. the condition of having abnormally large teeth. [meg-uh-don-shuh, -shee-uh] /ˌmɛg əˈdɒn ʃə, -ʃi ə/ noun 1. . megadontism meg·a·don·tism (měg’ə-dŏn’tĭz’əm) n. See macrodontia. macrodontia mac·ro·don·ti·a (māk’rə-dŏn’shē-ə, -shə) n. A condition in which the teeth are abnormally large. Also called megadontism, megalodontia.

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