engrailed
Concise Oxford English Dictionary © 2008 Oxford University Press:
engrailed
▶adjective chiefly Heraldry having semicircular indentations along the edge. Compare with invected.
– origin ME (as v. engrail): from OFr. engresler ‘make thin’, from en- + gresle ‘thin’, from L. gracilis.
'engrailed' also found in these Oxford entries:

