Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «G»:
Gouty arthritis: An attack that is usually extremely
painful of joint inflammation due to deposits of uric acid crystals
in the joint fluid (synovial fluid) and joint lining (synovial lining). Intense joint inflammation occurs as white blood cells engulf the uric acid crystals, causing pain, heat, ...
Gower syndrome (situational syncope)
Gower syndrome (situational syncope): The temporary loss of consciousness in particular kinds of situations. (Syncope is temporary loss of consciousness or, in plain English, fainting). The situations that trigger this reaction are diverse and include having blood drawn, straining while urinating o...
GPO:GPO stands for various things (such as the
Government Printing Office) but in a healthcare context (and many
other contexts) a GPO is a Group Purchasing Organization.
A medical GPO might be able to bring the purchasing power and
negotiating leverage of large medical consortiums or hospital sy...
Graft: Healthy skin, bone, or other tissue taken
from one part of the body to replace diseased or injured tissue
removed from another part of the body.
For example, skin grafts can be used to cover areas of skin that
have been burned or surgically removed....
Graft-versus-host disease: A complication of bone marrow transplants in which T cells in the donor bone marrow graft go on the offensive and attack the host's tissues. Graft-versus-host disease (GVHD) is seen most often in cases where the blood marrow donor is unrelated to the patient or when the do...
Gram (measure): A unit of measurement of weight and mass in the metric system. In weight, a gram is equal to a thousandth of a kilogram. In mass, a gram is equal to a thousandth of a liter (one cubic centimeter) of water at 4 degrees centigrade.
The word "gram" comes from the Late Latin "gramma" mea...
Gram calorie: See: Calorie....
Gram calorie (Calorie)
Calorie: A unit of food energy. In nutrition terms, the word calorie
is used instead of the more precise scientific term kilocalorie which represents
the amount of energy required to raise the temperature of a liter of water one
degree centigrade at sea level. The common usage of the word calorie...
Gram stain: The Danish bacteriologist J.M.C. Gram (1853-1938) devised a method of staining bacteria using a dye called crystal (gentian) violet. Gram's method helps distinguish between different types of bacteria.
The gram-staining characteristics of bacteria are denoted as positive or negative, dep...
Gram-negative: Gram-negative bacteria lose the crystal violet stain (and take the color of the red counterstain) in Gram's method of staining. This is characteristic of bacteria that have a cell wall composed of a thin layer of a particular substance (called peptidoglycan).
The Gram-negative bacteri...
Gram-positive: Gram-positive bacteria retain the color of the crystal violet stain in the Gram stain. This is characteristic of bacteria that have a cell wall composed of a thick layer of a particular substance (called peptidologlycan).
The Gram-positive bacteria include staphylococci ("staph"), str...
Granary weevil: A true weevil that is among the most destructive of all insects in stored grain and that is the culprit responsible for a disease called miller's lung.
The weevil larvae develop inside kernels of whole grain in storage, making an infestation difficult to remove in the milling proce...
Grand mal: A form of epilepsy characterized by tonic-clonic seizures. involving two phases -- the tonic phase in which the body becomes rigid, and clonic phase in which there is uncontrolled jerking. Tonic-clonic seizures may or may not be preceded by an aura, and are often followed by headache, con...
Grand mal epilepsy
Grand mal epilepsy: See: Grand mal....
Grand multipara: The term "multipara" applies to any woman who has given birth 2 or more times. A woman who has given birth 5 or more times is called a grand multipara.
For a pregnancy to count as a "birth", it must go to at least 20 weeks' gestation (the mid-point of a full-term pregnancy) or yield...