Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «M»:
means disease of the blood
vessels (arteries, veins, and capillaries). There are two
angiopathy: microangiopathy and
macroangiopathy. With microangiopathy, the walls of very small blood vessels
(capillaries) become so thick and weak that they bleed, leak pr...
Macrobiota: The living organisms (or flora and fauna) of a region that
are large enough to be seen with the naked eye. From the Greek macro-, large + bios, life.
Macrobiotic: Macrobiotic refers to the macrobiota, a region's
living organisms (or flora and fauna) large enough to be seen with the naked eye. However,
macro- comes from the Greek "makros" meaning not only "large" but also
"long". So macrobiotic can also be taken to me...
Macrobiotic diet: A diet
concept that incorporates Ayurvedic principles of food combining, relies mainly
on whole grains and vegetables, and claims to lengthen life and promote mental
and physical well-being. Proponents of this diet claim that it can prevent and
cure disease, including cancer, a...
Macrocephaly: An abnormally large head. The opposite of macrocephaly is microcephaly (an abnormally small head)....
Macrocephaly, multiple lipomas, and hemangiomas
Macrocephaly, multiple lipomas, and hemangiomas: Bannayan syndrome, a genetic disease characterized by macrocephaly (enlarged head), multiple lipomas (benign fatty tumors) and hemangiomas (benign blood vessel tumors). The macrocephaly occurs without enlargement of the cerebral ventricles. There is ...
Macrocytic: 1. Any abnormally large cell. The opposite of macrocytic is microcytic (an abnormally small cell).
2. An abnormally large red blood cell. Folic acid deficiency is one cause of macrocytic anemia....
Macrogenitosomia: Condition in which the external
sex organs are prematurely enlarged or abnormally enlarged.
In males, it is caused by an excess of the hormone androgen
during fetal development. In females, the clitoris may be
enlarged enough to resemble a small penis. Macrogenitosomia
Macroglobulinemia: A condition in which the blood contains high levels of large proteins and is too thick to flow through small blood vessels. The large protein is an antibody called macroglobulin or IgM. One type of macroglobulinemia is Waldenstrom macroglobulinemia, a type of cancer....
Macroglobulinemia, Waldenstrom: See: Waldenstrom macroglobulinemia....
Macroglossia: Enlarged tongue. Macroglossia is sometimes said to be associated with Down syndrome, but in that disorder the tongue is actually large only in relation to a smaller-than-normal mouth cavity. ...
Macrognathia: An abnormally large jaw. This
condition is associated with pituitary gigantism, tumors,
and other disorders. Macrognathia can often be corrected
with surgery. Also called prognathic mandible....
Macrolide: One in a class of antibiotics that includes Biaxin, Clarithromycin, Ery-Tab, and Erythromycin.
The macrolides inhibit the growth of bacteria and are often prescribed to treat rather common bacterial infections.
In more technical terms, the macrolides are a group of antibiotics produced by...
Macroorchidism: Abnormally large testes. To determine if the testes are too large, a device called an orchidometer is used that permits the testes to be compared to a series of plastic ovals (like miniature American footballs) of differing sizes. Macroorchidism is a diagnostic feature, for example,...
Macrophage: A type of white blood that ingests (takes in) foreign material. Macrophages are key players in the immune response to foreign invaders such as infectious microorganisms.
Blood monocytes migrate into the tissues of the body and there differentiate (evolve) into macrophages.