vadium

from The Collaborative International Dictionary of English v.0.48
Vadium \Va"di*um\, n. [LL., from L. vas, vadis, bail.] (Law)
   Pledge; security; bail. See {Mortgage}.
   [1913 Webster]

   {Vadium vivum} [LL.] (Law), a living pledge, which exists
      where an estate is granted until a debt is paid out of its
      proceeds.
      [1913 Webster]
    
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
VADIUM, contracts. A pledge, or surety. 
    

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