Category: M
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Margination
Adhesion of leukocytes to the walls of blood vessels in the first stages of inflammation.
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Marey’s law
A law stating that the heart rate varies inversely with arterial blood pressure (i.e., a rise or fall in arterial blood pressure brings about, respectively, a slowing or speeding up of heart rate).
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Marcus gunn syndrome
A congenital condition in which a ptotic eyelid retracts briefly when the mouth is opened or the jaw moved to one side. The person appears to wink each time the jaw is opened.
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Marcus gunn pupil
Diminished pupillary reaction to direct light; secondary to optic nerve disease.
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Marchiafava-micheli syndrome
A rare hemolytic anemia associated with paroxysmal nocturnal hemoglobinuria.
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Marchiafava-Bignami syndrome
Damage to the white matter of the brain, with dementia, resulting from chronic alcoholism, esp. excessive wine consumption.
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Marc
The residue remaining after a drug has been percolated. The substance being referred to is comprised of the remaining components of grapes, including the skin, pulp, and seeds, that are leftover after the wine-making process has been completed. On occasion, a type of brandy, such as the Italian variety known as grappa, is distilled from…
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Marburg virus disease
A frequently fatal disease caused by a virus classed as a member of the family Filoviridae. Clinically this disease is identical to that caused by the Ebola virus. An uncommon type of hemorrhagic fever, also known as green monkey disease, which is spread by African vervet monkeys. The disease begins abruptly, marked by sudden fever,…
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Maple bark disease
A hypersensitivity pneumonitis caused by inhalation of spores from the mold Cryptostroma corticate, which is present under the bark of logs cut from maple trees.
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Manudynamometer
A device for measuring the force of a thrust.