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Term Definition
Gastroesophageal reflux (GER)

A condition in which the muscle at the end of the esophagus does not close properly, allowing the contents of the stomach to leak back, or reflux, into the esophagus. This causes irritation such as a burning sensation in the chest or throat (heartburn) or the taste of stomach fluid in the back of the mouth (acid indigestion). Also known as acid reflux.

Gastroesophageal reflux disease (GERD)

Refers to the passage of gastric contents into the esophagus or oropharynx; with or without vomiting. GER can be a daily, normal physiological occurrence in infants, children and adolescents. Most episodes of GER in healthy individuals last less than 3 minutes, occur after eating, and cause few or no troublesome symptoms. Regurgitation or spitting up is the most obviously visible symptom to caregivers and pediatricians, particularly in the very young child, occurring daily in about 50% of infants less than 3 months of age. Regurgitation resolves spontaneously in most healthy infants by 12-14 months of age. Gastroesophageal reflux disease (GERD) refers to the symptoms and complications that may develop secondary to persistent GER. If left untreated, GERD can cause chronic inflammation of the esophagus and lungs, esophageal strictures (scars that narrow the esophagus), stomach ulcers, breathing problems, and an increased risk for esophageal cancer.

Gastrostomy Tube/gastric feeding tube (G-tube or "button")

A tube inserted through a small incision in the abdomen into the stomach and is usually used long term for administering nutrition and/or medications.


A gene is, in essence, a segment of DNA that has a particular purpose, i.e., that codes for (contains the chemical information necessary for the creation of) a specific enzyme or other protein.

Generalized anxiety disorder

A condition characterized by 6 months or more of chronic, exaggerated worry and tension that is unfounded or much more severe than the normal anxiety most people experience.


A nonessential amino acid; also a

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