Word Study
Subrogation
CIDE DICTIONARY
Subrogation, n. [Cf. F. subrogation, LL. subrogatio.].
The act of subrogating. Bouvier. Burrill. Abbott. [1913 Webster]
OXFORD DICTIONARY
Subrogation, n. Law the substitution of one party for another as creditor, with the transfer of rights and duties.
Derivative
subrogate v.tr.
Etymology
LL subrogatio f. subrogare choose as substitute (as SUB-, rogare ask)
For further exploring for "Subrogation" in Webster Dictionary Online