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        mongolism

        mon·gol·ism

        mongolism

         
        pronunciation:
        mang g lih zm [or] man g lih zm
        part of speech: noun
        definition: (outdated; no longer in scientific use; sometimes cap.) the abnormal condition of a person born with an additional chromosome, characterized by a flattened skull, slanted eyes, often decreased mental facility, and partial deafness; Down's syndrome.