UGI

Ugi, often encountered in uppercase as UGI, is an acronym that can refer to several distinct concepts in business, medicine, and chemistry. One common meaning is UGI Corporation, a United States–based multinational energy company headquartered in King of Prussia, Pennsylvania. UGI engages in the distribution and marketing of natural gas and electricity, and operates through subsidiaries with activities in North America and parts of Europe.

In medicine, UGI stands for upper gastrointestinal imaging, or the upper GI series. This radiographic test visualizes the esophagus, stomach, and the first part of the small intestine after the patient ingests a contrast agent such as barium. The procedure helps diagnose structural abnormalities, ulcers, inflammation, and motility disorders, and is frequently used alongside fluoroscopy to observe movement and function.

In chemistry, Ugi refers to the Ugi reaction, a four-component condensation that combines an amine, a carbonyl compound (aldehyde or ketone), an isocyanide, and a carboxylic acid to form a bis-amide product. The reaction is valued for rapidly generating diverse molecular libraries and is widely used in medicinal chemistry and materials science. The name honors the chemist associated with its development.