Use the A-Z list to browse more than 6,000 health-related topics in our library. Clicking on a term opens the definition and, in most cases, links to more information.
Also Known As: "Liquid X, Date Rape Drug, Liquid E, Gamma Hydroxybutyrate, Liquid Ecstasy, Gammahydroxybutyric Acid"
A colorless and odorless, salty liquid or powder that has sedative effects and has been used as a date rape drug. More Information on GHB: Alcohol & Substance Abuse
"GHb Test" is more commonly referred to as "Glycohemoglobin Test" in the medical community. Glycohemoglobin Test
Also Known As: "Fasting Hemoglobin, HbA1C Test, Diabetic Control Index, Hemoglobin A1C Test, Glycosylated Hemoglobin Test, Total Fasting Hemoglobin Test, Hb A1c"
A blood test that is used to monitor diabetes, a risk factor for heart disease. It measures the levels of hemoglobin in the blood that have been glycosylated, or connected to glucose. More Information on Glycohemoglobin Test: Diabetes & Endocrine Tests
"GI" is more commonly referred to as "Gastrointestinal" in the medical community. Gastrointestinal
Referring to the system of the body responsible for digestion (the processing of food to be used for energy). More Information on Gastrointestinal: Digestive Health Basics
"GI System" is more commonly referred to as "Digestive System" in the medical community. Digestive System
Also Known As: "Gastrointestinal System"
The system of the body responsible for digestion (the processing of food to be used for energy). It is commonly divided into the upper gastrointestinal (GI) tract (including the stomach) and the lower GI tract (including the colon). More Information on Digestive System: Digestive Health Basics
"GI Tract" is more commonly referred to as "Alimentary Canal" in the medical community. Alimentary Canal
Also Known As: "Lower GI Tract, Digestive Tract, Alimentary Tract, Gastrointestinal Tract, Upper GI Tract"
The passage through which food moves for digestion, including the upper gastrointestinal (GI) tract (e.g., mouth, esophagus, stomach) and the lower GI tract (e.g., small and large intestines, including the colon and rectum). More Information on Alimentary Canal: Digestive Health Basics
"Giant Cell Arteritis" is more commonly referred to as "Temporal Arteritis" in the medical community. Temporal Arteritis
Also Known As: "Cranial Arteritis, Granulamotous Arteritis, Horton's Disease"
A chronic vascular disease of unknown origin in the elderly, often associated with polymyalgia rheumatica. The arteries narrow, reducing blood flow in the affected areas. It may cause persistent headaches and vision loss. More Information on Temporal Arteritis: Ear, Eye & Face Pain
A rare type of soft tissue tumor marked by painless nodules in the dermis (the inner layer of the two main layers of tissue that make up the skin) and beneath the skin tissue. More Information on Giant Cell Fibroblastoma: Skin Cancer
"Giant Cell Inclusion Disease" is more commonly referred to as "Cytomegalic Inclusion Body Disease" in the medical community. Cytomegalic Inclusion Body Disease
Also Known As: "CIBD"
Illness caused by infection from the cytomegalovirus (CMV). While most patients do not experience symptoms, others may have serious or life-threatening complications. There is no cure.
A type of conjunctivitis associated with wearing contact lens, causing mild itching, blurred vision and light sensitivity, among other symptoms. GPC may be caused by irritation or by an allergic reaction to the buildup of proteins on the lens. More Information on Giant Papillary Conjunctivitis: Eye Conditions
A parasite found in feces. It usually enters the body through contaminated water, causing giardiasis. More Information on Giardia: Gastroenteritis & Food Illness
A parasite found in feces. It usually enters the body through contaminated water, causing giardiasis. More Information on Giardia Lambia: Gastroenteritis & Food Illness
A parasitic infection from eating contaminated food or unclean water. It may cause diarrhea, nausea and cramping. More Information on Giardiasis: Gastroenteritis & Food Illness
"GIFT" is more commonly referred to as "Gamete Intrafallopian Transfer" in the medical community. Gamete Intrafallopian Transfer
A type of assisted reproductive technology in which a woman's eggs are removed, combined with sperm and then injected into a fallopian tube. Fertilization (if it occurs) takes place within the body, rather that outside as with in-vitro fertilization. More Information on Gamete Intrafallopian Transfer: Fertility Issues
"Gigantism" is more commonly referred to as "Acromegaly" in the medical community. Acromegaly
Also Known As: "Marie disease, Somatotroph Adenoma"
Rare disorder in which an overproduction of growth hormone by the pituitary gland leads to overgrown hands, feet and/or facial features. More Information on Acromegaly: Diabetes & Endocrine Risks
The lack of the liver enzyme that breaks down bilirubin, resulting in a buildup of bilirubin in the blood and jaundice. More Information on Gilbert Syndrome: Liver, Pancreas & Biliary
"Gilchrist Disease" is more commonly referred to as "Blastomycosis" in the medical community. Blastomycosis
Also Known As: "North American Blastomycosis, Blastomyces Dermatitidis Infection"
A rare disease caused by inhaling the fungus Blastomyces dermatitidis, which lives in soil and wood. It causes problems with the lungs, skin, mucous membranes, bones, internal organs and joints. More Information on Blastomycosis: Pneumonia & Lung Infection
"Gilles de la Tourette Syndrome" is more commonly referred to as "Tourette Syndrome" in the medical community. Tourette Syndrome
Also Known As: "TS, Tourette Disease, Tourette Disorder"
A disorder marked by repeated and involuntary motor and vocal tics such as eye blinking, throat clearing or sniffing, arm thrusting, kicking movements, shoulder shrugging, or jumping. Usually occurs before age 18 and is more common in boys. More Information on Tourette Syndrome: Movement Disorders
An herb and root commonly used in cooking that is also used in some cultures to treat some medical concerns, such as nausea and vomiting. More Information on Ginger: Herbs & Supplements
An herb and root commonly used in cooking that is also used in some cultures to treat some medical concerns, such as nausea and vomiting. More Information on Ginger Root: Herbs & Supplements
The soft tissues in the mouth surrounding the necks of the teeth and covering the crowns of teeth that have not yet erupted. More Information on Gingiva: Oral Signs & Symptoms
"Gingival Flap Surgery" is more commonly referred to as "Gum Flap Surgery" in the medical community. Gum Flap Surgery
Also Known As: "Periodontal Flap Surgery"
A surgical procedure that temporarily separates the gums from the teeth and pulls them back to expose the tooth root and underlying bone. Often used to treat periodontitis. More Information on Gum Flap Surgery: Oral Infections
"Gingival Surgery" is more commonly referred to as "Gum Surgery" in the medical community. Gum Surgery
Also Known As: "Periodontal Surgery"
Any of a number of surgeries involving the gums, including gingivectomy, gingivoplasty, gingival flap surgery, soft-tissue grafts and crown lengthening. More Information on Gum Surgery: Oral Infections
Inflammation of the gums that is caused by plaque buildup in the mouth. This causes pain and bleeding in the gums. It is reversible, but can lead to a more serious and destructive form of periodontal disease called periodontitis. More Information on Gingivitis: Oral Infections
An herb commonly used in preventing and treating memory loss and other problems associated with Alzheimer's disease. It has also offered relief for some patients with peripheral artery disease. More Information on Ginkgo: Herbs & Supplements
An herb commonly used in preventing and treating memory loss and other problems associated with Alzheimer's disease. It has also offered relief for some patients with peripheral artery disease. More Information on Ginkgo Biloba: Herbs & Supplements
Ginkgo biloba is a nutritional supplement commonly used in preventing and treating memory loss and other problems associated with Alzheimer's disease. It has also offered relief for some patients with peripheral artery disease. More Information on Ginkgo Biloba & Heart Health: Heart Drug & Medication
An herb associated with improved immune system functioning. It is commonly used to help reduce stress or fatigue. More Information on Ginseng: Herbs & Supplements
"GISTs" is more commonly referred to as "Gastrointestinal Stromal Tumors" in the medical community. Gastrointestinal Stromal Tumors
Also Known As: "Gastrointestinal Leiomyosarcoma, Gastrointestinal Leiomyoma"
A type of soft-tissue sarcoma that can occur anywhere along the digestive tract. They originate in the connective tissue (stroma) that supports digestive organs. It is usually benign, but can be malignant. More Information on Gastrointestinal Stromal Tumors: Gastrointestinal System Cancer
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