distension

This term describes a physical expansion caused by internal pressure, typically associated with medical conditions or biological processes. It carries a clinical tone and suggests an abnormal or pathological stretching of an organ or tissue, such as the abdomen or a blood vessel. Because it refers to a state of being or a physiological condition, it is treated as an uncountable noun in most medical contexts. It describes the phenomenon of swelling rather than individual instances of a swollen object.