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[rey-dee-oh-thon] /ˈreɪ di oʊˌθɒn/

an on-the-air radio campaign, often lasting 24 hours or more, designed to raise money for a radio station, charity, the arts, etc., as from listeners phoning in and pledging specific donations, sometimes in exchange for gifts or premiums.


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    [rey-dee-oh-thawr-ee-uh m, -thohr-] /ˌreɪ di oʊˈθɔr i əm, -ˈθoʊr-/ noun, Chemistry. 1. a disintegration product of .

  • Radiotoxemia

    radiotoxemia ra·di·o·tox·e·mi·a (rā’dē-ō-tŏk-sē’mē-ə) n. Radiation sickness caused by the products of disintegration produced by the action of x-rays or other forms of radiation and by the depletion of certain cells and enzyme systems.

  • Radiotracer

    [rey-dee-oh-trey-ser] /ˈreɪ di oʊˌtreɪ sər/ noun, Chemistry. 1. a radioactive isotope used as a . radiotracer ra·di·o·trac·er (rā’dē-ō-trā’sər) n. A radioactive isotope used as tracer.

  • Radiotoxic

    [rey-dee-oh-tok-sik] /ˌreɪ di oʊˈtɒk sɪk/ adjective, Pathology. 1. causing radiation sickness. /ˌreɪdɪəʊˈtɒksɪk/ adjective 1. of or denoting the toxic effects of radiation or radioactive substances radiotoxic ra·di·o·tox·ic (rā’dē-ō-tŏk’sĭk) adj. Of or being a radioactive substance that is toxic to living cells or tissues. ra’di·o·tox·ic’i·ty (-tŏk-sĭs’ĭ-tē) n. radiotoxic (rā’dē-ō-tŏk’sĭk) Relating to or being a radioactive substance […]

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