Category: M

  • Muscarinic

    Referring to a neurone or receptor stimulated by acetylcholine and muscarine. To the effects of the neurotransmitter acetylcholine on nerves of the parasympathetic nervous system.  

  • Muscarine

    A poison found in fungi. The poisonous principle found in some toadstools. It is a cholinergic substance with pharmacological properties resembling those of acetylcholine, a chemical neurotransmitter released at the junctions (synapses) of parasympathetic nerves and at the junctions where nerves enter muscles.  

  • Murphy’s sign

    A sign of an inflamed gall bladder, where the person will experience pain if the abdomen is pressed while he or she inhales [Described 1912. After John Benjamin Murphy (1857-1916), US surgeon.] Pain on deep inspiration when an inflamed gallbladder is palpated by pressing the fingers under the rib cage.  

  • Murder

    The crime of killing someone intentionally.  

  • Mural thrombus

    A thrombus which forms on the wall of a vein or artery. A blood clot that forms on the wall of the heart, especially along an immobile section of the heart damaged by myocardial infarction or cardiomyopathy. Such clots may occasionally embolize, causing stroke or organ damage. A blood clot, or thrombus, forms on the…

  • Munchausen’s syndrome by proxy

    A mental disorder in which someone tries to get hospital treatment for someone else such as their child or an elderly relative. It is regarded as a form of child abuse, as the person may cause a child to be ill in order to receive attention. Munchausen syndrome by proxy (MSBP), a member of the…

  • Multivitamin

    A preparation containing several vitamins and sometimes minerals, used as a dietary supplement. A dietary supplement that supplies the essential vitamins and minerals that people do not always obtain in sufficient amounts in their regular diets. Multivitamins, which often contain minerals, are usually taken daily. Taking a multivitamin does not compensate for poor food choices,…

  • Multiresistant

    Resistant to several types of antibiotic.  

  • Multipolar neurone

    A neurone with several processes.  

  • Multiple organ dysfunction syndrome

    A state of continuous disturbances and abnormalities in organ systems, rather than true failure, e.g. following trauma and sepsis. It is often fatal. Progressive failure of two or more organ systems, resulting from acute, severe illnesses or injuries (i.e., sepsis, systemic inflammatory response, trauma, burns) and mediated by the body’s inability to sufficiently activate its…