- The ejection of matter from the stomach in retrograde fashion through the esophagus and mouth. SYN: emesis (1), vomition, vomitus (1).- cyclic v. a syndrome of recurrent bouts of v. seen especially in preverbal children; many affected children later develop typical migraine headaches.- dry v. SYN: retching.- epidemic v. virus caused by Norwalk virus, a 27-nm RNA virus in the family Caliciviridae frequently occurring in a group of people ( e.g., in a school or small community) suddenly and without prodromal illness or malaise, is intense while it lasts, but ceases abruptly after 24–48 hours; symptoms are headache, abdominal pain, giddiness, and diarrhea in most of the cases, and extreme prostration in about 75%. SYN: epidemic nausea.- fecal v. vomitus with appearance and/or odor of feces suggestive of long-standing distal small bowel or colonic obstruction. SYN: copremesis, stercoraceous v..- morning v. v. occurring on rising or immediately after breakfast in some women during early pregnancy. SYN: morning sickness.- pernicious v. uncontrollable v..
* * *vom·it·ing -iŋ n an act or instance of disgorging the contents of the stomach through the mouth called also emesis
* * *n.the reflex action of ejecting the contents of the stomach through the mouth. Vomiting is controlled by a special centre in the brain that may be stimulated by drugs (e.g. apomorphine) acting directly on it; or by impulses transmitted through nervous pathways either from the stomach (e.g. after ingesting irritating substances or in stomach diseases, such as peptic ulceration or pyloric stenosis), the intestine (e.g. in intestinal obstruction), or from the inner ear (in motion sickness). The stimulated vomiting centre sets off a chain of nerve impulses producing coordinated contractions of the diaphragm and abdominal muscles, relaxation of the muscle at the entrance to the stomach, etc., causing the stomach contents to be expelled. Medical name: emesis.
* * *vom·it·ing (vomґit-ing) forcible expulsion of stomach contents through the mouth; called also emesis.
Medical dictionary. 2011.