Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «M»:
MELD: Acronym for Model End Stage Liver Disease. A disease severity scoring system for adults with liver disease, designed to improve the organ allocation in transplantation based on the severity of liver disease rather than the length of time on the waiting list. The MELD score is based only on lab...
Melena: Stools or vomit stained black by blood pigment or dark
blood products. ...
Melioidosis: An infectious illness, also called Whitmore's
disease, that is most frequent in Southeast Asia and Northern
Australia and is caused by a bacteria called "Pseudomonas
pseudomallei" found in soil, rice paddies and stagnant waters.
Humans catch the disease by inhalation of contaminate...
Melissophobia: Fear of bees.
A phobia is an unreasonable sort of fear that can cause avoidance
and panic. Phobias are a relatively common type of anxiety disorder.
Phobias can be treated with cognitive behavioral therapy using
exposure and fear reduction techniques. In many cases, anti-anxiety
Melittin: The principal toxic component in bee venom. Melittin is a relatively short peptide consisting of 26 amino acids. It is a powerful cell lytic agent and binds rapidly to red blood cells causing the release of hemoglobin in the blood plasma. Lysis of these cells occurs when the organization o...
Melomania: A singular passion for music that is beyond all reason. From the French melomanie, from the Latin melos, song + -mania, frenzy....
Melorheostosis: A rare bone condition that usually begins in childhood characterized by thickening of the bones (sclerosis) of a limb. Pain is frequent in the involved limb. The affected bone can have the appearance of "dripping candle wax" when visualized with X-ray imaging....
Meltdown, genetic: A genomic crisis due to an extraordinarily high rate of mutation, a phenomenon known to occur in viruses and perhaps in other organisms.
For example, the antiviral agent Ribavirin acts by inducing genomic meltdown. The drug accelerates the already-high mutation rate of RNA viruse...
Membrane: A very thin layer of tissue that covers a surface. ...
Membrane attack complex
Membrane attack complex: Abbreviated MAC. An abnormal activation of the complement (protein) portion of the blood, forming a cascade reaction that brings blood proteins together, binds
them to the cell wall, and then inserts them through the
cell membrane. MAC formation allows water, ions, and oth...
Membrane cofactor protein
Membrane cofactor protein: See: MCP....
Membrane metalloendopeptidase: See: Metallomembrane endopeptidase....
Membrane, epiretinal: See: Macular pucker....
Membrane, vaginal: A thin membrane which completely or partially occludes the vaginal opening. This fold of mucous membrane is usually present at birth at the orifice of the vagina. It is also called the hymen, a Greek word
meaning "skin" or "membrane." The ancient Greeks applied the word "hymen" t...
Membrane-associated neutral endopeptidase
Membrane-associated neutral endopeptidase: See: Metallomembrane endopeptidase....