Miosis
Contraction of the pupil. The opposite of miosis is mydriasis.
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- Miscarriage
Inadvertent loss of a pregnancy before the fetus is viable. A considerable proportion of pregnancies end in miscarriage. Also known as 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 exposure to teratogens (agents that can injure the fetus), and physical problems in the […]
- 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 removes a segment of the […]
- Misophonia Medical Definition: Click for Facts
McGraw-Hill Professional, 2012.
- Missense mutation
A genetic change that results in the substitution of one amino acid in protein for another. A missense mutation is responsible for sickle hemoglobin, the molecular basis of sickle cell trait and sickle cell anemia.