M
macerate; maximal; symbol, mega; member; meter; minim; [L.] mil or mille (thousand); misce (mix); mistura (mixture); symbol, molar (solution)—the expressions M/10, M/100, etc., denote the strength of a solution in comparison with the molar, as tenth molar, hundredth molar, etc.; muscle; myopia.
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m-
symbol, meta-.
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M & B 693
sulfapyridine.
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M cells
special epithelial cells associated with Peyer’s patches and lymphoid follicles that actively take up particulate matter from the intestinal contents. They are probably the portal of entry for bacteria and viruses.
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M component
a homogeneous immunoglobulin produced by a single clone of cells in a monoclonal gammopathy. May consist of either whole immunoglobulin molecules or their subunits, e.g. light chains or heavy chains. Called also paraprotein, myeloma protein or M protein.
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M line
a histological structure in myofibrils in skeletal muscle. The line runs transversely to the length of the myofibrils and corresponds to the segment occupied by myosin myofilaments.
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M phase
see cell cycle.
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M protein
myeloma protein; membrane protein.
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M substance
a dense zone in each myofilament of a muscle fiber and contributing to the M band which runs across the fiber.
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M:E ratio
myeloid:erythroid ratio.
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