Dictionary.net

• trezh'[=u]r-tr[=o]v, n. treasure or money found in the earth, the owner unknown. [Treasure and trové, pa.p. of O. Fr. trover, to find.]

1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson

• n. [Latin, French] Any money, bullion, &c., found in the earth, the owner of which is not known, in which case it is claimed by the crown.

1871 - The Cabinet Dictionary of the English Language