Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «M»:
Minor salivary gland
Minor salivary gland: A small gland which produces saliva. There
are numerous minor salivary glands distributed within the mouth and palate. ...
Minot-Von Willebrand disease
Minot-Von Willebrand disease: See: Von Willebrand disease....
Miosis: Contraction of the pupil. The opposite of mydriasis. ...
Mirror, mouth: See: Mouth mirror....
Miscarriage: Inadvertent loss of a pregnancy before the fetus is viable. A considerable proportion of pregnancies end in a miscarriage. Also called a spontaneous abortion....
Miscarriage, multiple: More than one miscarriage for a woman. In multiple miscarriages, there is about a 5 percent chance that one member of the couple is carrying a chromosome translocation responsible for the miscarriages. Other causes of multiple miscarriage include Rh incompatibility, continuing...
Mismatch repair: A system within the cell for correcting errors in DNA that works by detecting and replacing bases in the DNA that are wrongly paired (mismatched bases). The system repairs the mismatch.
When there is a mismatch in the DNA, a mismatch correction enzyme goes to that strand of DNA and ...
Missense mutation: A genetic change involving the substitution of one base in the DNA for another which results in the substitution of one amino acid in a polypeptide for another. A missense mutation is a "readable" genetic message although its "sense" (its meaning) is changed. This is in contrast ...
Mite: A tiny eight-legged creature belonging to the Order Acarina related to spiders and ticks. Some mites live freely and others as parasites. Mites can attack plants and animals, carry disease, and cause allergies. acaricide....
Mite, dust: See: Dust mite....
Mite-borne typhus: Scrub typhus, a mite-borne
infectious disease caused by a microorganism, Rickettsia tsutsugamushi, characteristically
with fever, headache, a raised (macular) rash, swollen glands (lymphadenopathy) and a dark
crusted ulcer (called an eschar or tache noire) at the site of the chigg...
Miticide: An agent, usually a chemical, that kills mites. This class of pesticides is large and includes antibiotic miticides, carbamate miticides, formamidine miticides, mite growth regulators, organophosphate miticides, and many others. From mite + -cide, to kill. Also known as an acaricide....
Mitochondria: Normal structures responsible for energy production in cells.
Mitochondria are located in the cytoplasm outside the nucleus of the cell. They
consist of two sets of membranes, a smooth continuous outer coat and an inner
membrane arranged in tubules or in folds that form plate-like d...
Mitochondrial: Referring to mitochondria. The mitochondria are normal
structures called organelles in cells. They are located in the cell's cytoplasm
outside the nucleus.
The mitochondria are responsible for energy production. They consist of two
sets of membranes, a smooth continuous outer coat...