pyloric constriction

py·lor·ic con·stric·tion

circular groove on the external aspect of the gut at the gastroduodenal junction overlying the pyloric sphincter, thus demarcating the pyloric orifice.

py·lor·ic con·stric·tion

(pī-lōr'ik kŏn-strik'shŭn)
A prominent fold of mucous membrane at the gastroduodenal junction overlying the pyloric sphincter.
References in periodicals archive ?
To clarify; ST: stomach; S spleen; L: liver; P: pectoral muscle; I: intestine; Fu, fundic region; ca cardiac region; py: pyloric region; O: esophagus; Do: duodenum; pys external pyloric constriction; gc: greater curvature; ic: lesser curvature.