Category: M

  • Mesentery

    A membrane to invest and suspend internal organs. A double layer peritoneum which attaches the small intestine and other abdominal organs to the abdominal wall. Fold of peritoneum that holds abdominal organs (e.g., stomach, parts of the small intestine, spleen) to the posterior wall of the abdomen. A supporting membrane that attaches various internal organs…

  • Mesencephalon

    The midbrain, cerebrum. The small section of brain stem excluding the pons and medulla linking the hindbrain to the forebrain. The midbrain; one of three primitive cerebral vesicles from which develop the corpora quadrigemina, the crura cerebri, and the aqueduct of Sylvius.  

  • Merozygote

    A partial zygote produced by a partial genetic exchange in bacteria. A bacterial mechanism of gene transfer in which part of the genome, or chromosome complement, is transferred into an intact recipient cell.  

  • Merozoite

    The infective stage of Plasmodium that invades red blood cells. Stage in the life cycle of the malaria parasite and of certain other parasites. A stage in the life cycle of the malaria parasite (Plasmodium). Many merozoites are formed during the asexual division of the schizont. The released merozoites may invade new red blood cells…

  • Merogenote

    A piece of chromosome that has entered a bacterium from the environment.  

  • Merit pay

    A salary increase based on performance and not upon years of service.  

  • Mere exposure hypothesis

    The belief that an increase in attraction to a person or an object is related to the frequency of observation of the person or object.  

  • Meprobramate

    A minor tranquilizer.  

  • Mephobarbital

    A barbiturate sedative/hypnotic Mebaral is a brand name.  

  • Meperidine

    A synthetic derivative of opium. Narcotic analgesic commonly used to treat moderate to severe pain. Adverse effects include drowsiness, gastrointestinal disturbances, circulatory and respiratory depression, and the potential for addiction.