Dyspepsia
/dɪsˈpepʃə/
Definition 1 of 1
Pro Tip 1/3Medical Term
Dyspepsia is primarily used in medical or health-related discussions rather than casual conversation. 
After eating, she experienced dyspepsia that prompted a visit to the gastroenterologist.
Pro Tip 2/3Not Interchangeable
'Dyspepsia' describes stomach discomfort but doesn't always mean 'heartburn' even though they're related. 
He complained of dyspepsia, though it was not clear if heartburn was the main issue.
Pro Tip 3/3Professional Tone
Using 'dyspepsia' gives a sentence a formal or clinical tone, compared to saying 'upset stomach'. 
The patient reported dyspepsia after meals, especially in the evening.