ˌvadəˈmōnēəm noun
( plural vadimo·nia -ēə)
Etymology: Latin, from vad-, vas bail, pledge, security — more at wed
: any of several legal pledges or securities: as
a. : a contract of suretyship in Roman and civil law used in sales to secure the payment of the purchase price
b. : a bond or pledge in early English law for appearance before a judge on a certain day