methaemoglobin

noun

1. methemoglobin.

noun Biochemistry.

1. a brownish compound of oxygen and hemoglobin, formed in the blood, as by the use of certain drugs.

noun

1. a brown compound of oxygen and haemoglobin formed in the blood by the action of certain drugs

n.

1. A brownish-red crystalline organic compound formed in the blood when hemoglobin is oxidated either by 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.