transmutation
1 : a doctrine in property law which allows the conversion of a separate property interest into marital or community property by agreement between spouses or by contribution of marital or community assets to the separate property (as for maintenance or improvements)
;also : a doctrine in property law which allows the conversion of a marital or community property interest into separate property
2 : an act or instance of converting a property interest in accordance with the doctrine of transmutation [absent a by deed]