gastr-, gastro-, gaster-, gastero-, gastri-, -gastria-

(Greek: stomach, belly)

gastrodynia (s) (noun) (no pl)
A stomach pain or ache: Jane's tummy was hurting her so much that she went to the doctor who examined her and told her that she had a case of gastrodynia and if she suffered from constipation or had an allergy which could be a cause for this disorder.
gastroenteritis (noun)
1. Inflammation of the stomach and the intestines that can cause nausea and vomiting and/or diarrhea.

Gastroenteritis has numerous causes: including infectious organisms (viruses, bacteria, etc.), food poisoning, and stress.

2. Inflammation of the lining of the stomach and small and large intestines.

It is usually caused by infection with a microorganism but can also be caused by ingestion of certain chemical toxins or drugs.

Usually, people have diarrhea, nausea, vomiting, and abdominal pain.

gastroenteropathy (s) (noun), gastroenteropathies (pl)
Any disorder of the alimentary canal: When Bruce went to see his doctor about feeling ill in his stomach, he was told that he had gastroenteropathy, an infection in his stomach and intestines.
gastroesthesia (s) (noun), gastroesthesias (pl)
Having a sensitive stomach: Jason has gastroesthesia when he sees and/or smells something which he perceives to be disgusting.
1. The artificial feeding of a person through a tube passed into the stomach.
2. Feeding someone with a nutrient solution into the stomach through a tube through a surgically created opening.
3. Forced feeding with a stomach tube.