Methemoglobin: A form of hemoglobin that is incapable of carrying oxygen, sometimes found in the blood after certain poisonings, such as with aniline, nitrates, and other compounds.

Methemoglobin: A form of hemoglobin that is incapable of carrying oxygen, sometimes found in the blood after certain poisonings, such as with aniline, nitrates, and other compounds.
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