vad·​i·​mo·​ni·​um | \ ˌvadəˈmōnēəm\
plural vadimonia\ -​ēə \

Definition of vadimonium

: any of several legal pledges or securities: such 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

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History and Etymology for vadimonium

Latin, from vad-, vas bail, pledge, security

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