*bottone*

{ } a. [ F. boutonné, fr. boutonner to bud, button. ] (Her.) Having a bud or button, or a kind of trefoil, at the end; furnished with knobs or buttons. [ 1913 Webster ]

Cross bottony (Her.), a cross having each arm terminating in three rounded lobes, forming a sort of trefoil. [ 1913 Webster ]