If a part of your body is distended, or if it distends, it becomes swollen and unnaturally large. [medicine, formal]
Through this incision, the abdominal cavity is distended with carbon dioxide gas. [be VERB-ed]
The colon, or large intestine, distends and fills with gas. [VERB]
[Also
VERB noun
]Synonyms: swell, stretch, expand, increase
distended adjective ...an infant with a distended belly.
Synonyms: swollen, stretched, expanded, enlarged