Minting. to make dots or curves on the cylindrical edge of (a coin, medal, etc.) so as to form a pattern.
Origin of engrail
1375–1425;late Middle Englishengrelen < Anglo-French,Middle Frenchengresler, equivalent to en-en-1 + gresler to make slender ≪ Latingracilisgracile; compare Frenchgrêle kind of file, derivative of grêler