What is the definition or description of: elimination diet?

Food sleuthing: Often times, someone may react to a specific food, but we just don't know what it is. We may suspect it is a food, because symptoms like abdominal cramping pain and diarrhea occur after eating. An elimination diet is one that removes one type of substance completely from oral intake for a month at a time. Hopefully over several months, we are able to identify the culprit food, so you can avoid it!

See below: An elimination diet is a method of identifying foods that an individual cannot consume without adverse effects. Adverse effects may be due to food allergy, food intolerance, other physiological mechanisms (such as metabolic or toxins), or a combination of these. Elimination diets typically involve entirely removing a suspected food from the diet for a period from two weeks to two months.