[meg-uh-tuhn] /ˈmɛg əˌtʌn/

one million .
an explosive force equal to that of one million of TNT, as that of atomic or hydrogen bombs.
Abbreviation: MT.
one million tons
an explosive power, esp of a nuclear weapon, equal to the power of one million tons of TNT mt

unit of explosive power equal to one million tons of TNT, 1952, from mega- + ton. Related: Megatonnage.


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  • Megatherm

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

  • Megadose

    [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.

  • Megadontism

    [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.

  • Megavitamin

    [meg-uh-vahy-tuh-min; British also meg-uh-vit-uh-min] /ˈmɛg əˌvaɪ tə mɪn; British also ˈmɛg əˌvɪt ə mɪn/ adjective 1. of, relating to, or using very large amounts of : megavitamin therapy. Compare . noun 2. megavitamins, doses of much larger than the recommended dietary allowances. megavitamin meg·a·vi·ta·min (měg’ə-vī’tə-mĭn) n. A dose of a vitamin greatly exceeding the amount […]

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