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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «M»:

  1. Menangle virus Menangle virus
    Menangle virus: A virus that causes a disease first found in a piggery near Sydney, Australia in 1997. The virus was highly contagious, moving between pigs in different pens and sheds. It caused numerous deformed and stillborn piglets with abnormalities of the central nervous system. The virus also ...
  2. Menarche Menarche
    Menarche: The time in a girl's life that menstruation first begins. During the menarche period, menstruation may be irregular and unpredictable. Mood, weight, activity level, and growth rate may fluctuate with the hormone levels as well. Synonymous with female puberty. ...
  3. Mendel, Gregor Mendel, Gregor
    Mendel, Gregor: The great Moravian/Bohemian biologist (1822-84) who set forth the basic laws that constitute the foundation of classical genetics. Mendelian inheritance is the manner in which genes and traits are passed from parents to their children. The modes of Mendelian inheritance are autosoma...
  4. Mendelian Mendelian
    Mendelian: Referring to the great Moravian/Bohemian biologist Gregor Mendel (1822-84) who set forth the basic laws that constitute the foundation of classical genetics. Mendelian inheritance is the manner in which genes and traits are passed from parents to their children. The modes of Mendelian in...
  5. Mendelian inheritance Mendelian inheritance
    Mendelian inheritance: The manner in which genes and traits are passed from parents to their children. The four modes of Mendelian inheritance are autosomal dominant, autosomal recessive, X-linked dominant and X-linked recessive. The term "mendelian" refers to the great Austrian biologist Gregor Men...
  6. Mendelism Mendelism
    Mendelism: The principles of genetics, specifically of single-gene traits, based on the work of Gregor Mendel (1822-84), a Moravian monk and biologist who established the laws that are the foundation of classical genetics. Mendel lived in an Augustinian monastery where teaching and research were e...
  7. Menetrier disease Menetrier disease
    Menetrier disease: See: Giant hypertrophic gastritis....
  8. Menetrier's disease Menetrier's disease
    Menetrier's disease: See: Giant hypertrophic gastritis....
  9. Meniere disease Meniere disease
    Meniere disease: A condition with recurrent vertigo accompanied by ringing in the ears (tinnitus) and deafness. Symptoms include vertigo, dizziness, nausea, vomiting, loss of hearing (in the affected ear), and abnormal eye movements. Meniere disease is due to dysfunction of the semi-circular can...
  10. Meninges Meninges
    Meninges: The three membranes that cover the brain and spinal cord (singular: meninx). The outside meninx is called the dura mater, and is the most resilient of the three. The center layer is the arachnoid membrane and the thin innermost layer is the pia mater. Inflammation of the meninges (meni...
  11. Meningioma Meningioma
    Meningioma: A common type of slow growing, usually benign brain tumor that arises from the dura, one of the meninges, the membranes covering the brain and spinal cord. A meningioma may occur wherever there is dura but the most common sites are over the cerebral hemispheres of the brain. It is the on...
  12. Meningitis Meningitis
    Meningitis: Inflammation of the meninges, usually due to a bacterial infection but sometimes from viral, protozoan, or other causes (in some cases the cause cannot be determined). The onset is usually rapid (acute), and if untreated, the disease can be fatal within a very short period of time....
  13. Meningitis vaccine Meningitis vaccine
    Meningitis vaccine: This term usually refers to a vaccine used to prevent meningococcal meningitis, an inflammation of the membranes that cover the brain and spinal cord due to bacterial infection by Neisseria meningitidis. The CDC's Advisory Committee on Immunization Practices in 1999 made a unanim...
  14. Meningitis, aseptic Meningitis, aseptic
    Meningitis, aseptic: Inflammation of the meninges that is not caused by bacterial infection. Viral meningitis is the most common cause of aseptic meningitis, but other causes include systemic lupus erythematosus, cancers, Behcet's disease, medications, and others. See also meningitis, viral....
  15. Meningitis, bacterial Meningitis, bacterial
    Meningitis, bacterial: Inflammation of the meninges due to a bacterial infection. Haemophilus influenzae type b (Hib) was the leading cause of bacterial meningitis before the 1990s, but new vaccines given to children as part of their routine immunizations have reduced the occurrence of invasive dis...