Duodenal
/ˌduːəˈdiːnl/
Definition 1 of 1
Pro Tip 1/3Medical Context
Used in medical circumstances to talk about issues regarding the upper part of the small intestine. 
She had a series of duodenal tests to determine the cause of her abdominal pain.
Pro Tip 2/3Specific Region
Refers specifically to the first section of the small intestine, not to other digestive organs. 
The surgeon removed a blockage in the duodenal area.
Pro Tip 3/3Not Interchangeable
Don't confuse 'duodenal' with similar medical terms; it's not interchangeable with 'intestinal' or 'gastric'. 
Her duodenal discomfort is distinct from gastric issues.