Category: M

  • Mucoid pseudomonas aeruginosa

    A variant of P. aeruginosa that resists both phagocytosis and antibiotic treatment by secreting a slimy protective coating (alginate slime). It is more virulent than nonmucoid-secreting forms of P. aeruginosa and often colonizes patients with bronchiectasis or cystic fibrosis.  

  • Male pseudohermaphroditism

    A condition in a male marked by a small penis, perineal hypospadias, and scrotum without testes, thereby resembling the vulva. This condition can be due to disease of the adrenal gland or a feminizing tumor of the undescended testis.  

  • Mid-level provider

    A category of health care professionals that includes physician assistants, nurse midwives, nurse anesthetists, and nurse practitioners.  

  • Membrane-bound protein

    A protein that is part of a cell membrane and acts as a receptor for substances transported in extracellular fluid or as an agent that mediates the transport of chemicals into or out of the cell.  

  • Myoelectric prosthesis

    An prosthetic device operated by battery-powered electric motors that are activated through electrodes by the myoelectric potentials provided by muscles.  

  • Mouth prop

    A metal or rubber device inserted between the jaws to maintain the mouth in an open position.  

  • Maddox prism

    Two base-together prisms used in testing for cyclophoria or torsion of the eyeball.  

  • Multifetal pregnancy reduction

    In multiple pregnancies (e.g., triplets, quadruplets), the procedure for reducing the number of fetuses, to minimize the risk of maternal and fetal complications later in the pregnancy.  

  • Membranous pregnancy

    Pregnancy in which the amniotic sac ruptures and the embryo comes to lie in direct contact with the uterine wall.  

  • Membrane potential

    The electrical charge or potential difference between the inside and outside of a cell membrane.