| Condition/Disease | Definition |
| abscess | swelling of tissues from infection |
| achalasia | disease of the esophagus |
| anorexia | loss of appetite |
| appendicitis | inflammation of the appendix |
| ascites | accumulation of fluid in the peritoneal cavity |
| bulimia | binge eating and purging by vomiting or laxatives |
| cholecystitis | inflammation of the gallbladder |
| cholelithiasis | presence of stones in the gallbladder or common bile duct |
| cirrhosis | chronic disease of the liver causing scarring |
| cleft palate | congenital, opening in the roof of the mouth, or palate, that connects the mouth with the nasal cavity |
| constipation | difficulty in defecation or infrequent defecation |
| crohn's disease | chronic inflammatory bowel disease affecting the ileum or colon |
| diarrhea | frequent watery bowel movements |
| diverticulitis | inflammation of the sacs in the intestinal tract usually in the colon |
| dysentery | acute inflammation of the colon, which is caused by microorganisms, that results in diarrhea |
| dyspepsia | indigestion |
| emesis | suffix that means vomiting |
| enteritis | inflammation of the small intestines |
| esophageal stricture | narrowing of the esophagus making it difficult to pass to the stomach |
| esophageal varices | enlargement of the esophageal veings caused by pressure |
| fissure | split in the epithelial surface of the anal canal |
| fistula | abnormal passage from one body organ to another |
| gastritis | inflammation of the stomach |
| gastroenteritits | inflammation of the stomach and small intestine |
| gastroesophageal reflux disease (gerd) | regurgitation of stomach contents into the esophagus |
| gingivitus | inflammation of the gums |
| halitosis | bad breath |
| hematemesis | vomiting blood |
| hemorrhoids | varicose veins in the rectum |
| hepatits | inflammation of the liver |
| hiatal hernia | protrusion of part of the stomach through the diaphragm into the chest cavity |
| ileitis | inflammation of the ileum |
| ileus | intestinal obstruction |
| inguinal hernia | outpouching of the intestines into the inguinal region of the pelvic cavity |
| inflammatory bowel syndrom (ibs) | abnormal discomfort and irregular bowel activity |
| jaundice | too much bilirubin in the blood causing the skin and whites of the eyes to have a yellowish cast |
| malabsorption syndrome | inadequate absorption of nutrients from the intestinal tract |
| pancreatitis | inflammation of the pancreas |
| peptic ulcer | an area of tissue erosion, or an ulcer, usually found in the duodenum that results from too much acid secretion |
| peritonitis | inflammation of the smooth transparent serous membrane that lines the cavity of the abdomen |
| pilonidal cyst | cyst in the rectal area caused by tissue being trapped below the skin |
| polyphagia | excessive appetite or eating |
| polyposis | small tumors with a footlike attachment in the mucous membrane of the colon |
| postprandial | relating to after a meal |
| pyorrhea | purulent discharge from dental tissue |
| reflux esophagitis | inflammation of the esophagus from a backflow of stomach acid into the esophagus |
| regurgitation | backflow of fluids and solids from the stomach up the esophagus and to the mouth |
| ulcerative colitits | ulceration of the mucous membranes of the colon |
| volvulus | bowel twisting upon itself, requires immediate surgery |
