What is having a bud or button, or a kind of trefoil, at the end; furnished with knobs or buttons. Cross bottony (Her.), a cross having each arm terminating in three rounded lobes, forming a sort of trefoil called?

bottone — Having a bud or button, or a kind of trefoil, at the end; furnished with knobs or buttons. Cross bottony (Her.), a cross having each arm terminating in three rounded lobes, forming a sort of trefoil. (Webster's 1913.)