1) Coining fee 2) Historic period in metallurgy 3) Money-coining cost 
difference between cost of minting coin and its value
• (n.) A sum formerly levied to pay the expense of coinage; -- now called seigniorage.
Bras'sage noun [ French] A sum formerly levied to pay the expense of coinage; -- now called seigniorage . 
French term for the vigorous shaking of the bottles during the production of champagne in order to bring the yeast into suspension and thus make full use of its abilities.
a charge to cover the costs of coining money.