exogastric en · ADJ
Etymology
From exo- + gastric.
Meanings
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(not-comparable) Outside of the stomach.
Preoperatively and intraoperatively it is difficult to distinguish benign and malignant lesions; all may demonstrate a mixture of intramural, endogastric and exogastric appearances.
2007, Alan H. Freeman, Radiology of the Stomach and Duodenum, page 139:
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(not-comparable) Of the shell of a mollusc, curving forwards towards the head.
I interpret Mellopegma as exogastric and separate it from Peel's (1991) class Helcionelloida because of its extremely narrow aperture with uniformly ventrally curved lateral margins.
1998, Norman Dennis Newell, Bivalves: An Eon of Evolution:Vexing are two exogastric genera of the Simard limestone.
1957, Rousseau Hayner Flower, Curt Teichert, The cephalopod order Discosorida, page 41: