| temps utile | Synonym: utilization time. Origin: Fr. Service or utilization time (05 Mar 2000) |
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| LES | <anatomy> A muscular sphincter located at the junction of the oesophagus and the stomach. On closure the lower oesophageal sphincter prevents the back wash (reflux) of stomach acid into the oesophagus where it may damage the mucosa. See: gastrooesophageal reflux disease. (16 Mar 1998) |