methemoglobin(redirected from hemoglobin M)
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A brownish-red form of hemoglobin that occurs when hemoglobin is oxidized either during decomposition of the blood or by the action of various oxidizing drugs or toxic agents. It contains iron in the ferric state and cannot function as an oxygen carrier.
(Biochemistry) the US spelling of methaemoglobin
met•he•mo•glo•bin(mɛtˈhi məˌgloʊ bɪn, -ˈhɛm ə-, -ˌhi məˈgloʊ-, -ˌhɛm ə-)
a form of hemoglobin in which iron has been oxidized, resulting in brownish blood that transports less oxygen.