engrailed 
adjective chiefly Heraldry
Having semicircular indentations along the edge. Compare with invected.Nevertheless, the potential role of the engrailed gene in segmentation has been the focus of comparative studies....
- For the Oriel Hall coat of arms this has been changed to a gold lion rampant on a blue field within a gold engrailed border.
Origin
Late Middle English (as verb engrail): from Old French engresler 'make thin', from en- (expressing a change of state) + gresle 'thin', from Latin gracilis.