cash collateral
(a) In this section, “cash collateral” means cash, negotiable instruments, documents of title, securities, deposit accounts, or other cash equivalents whenever acquired in which the estate and an entity other than the estate have an interest and includes the proceeds, products, offspring, rents, or profits of property and the fees, charges, accounts or other payments for the use or occupancy of rooms and other public facilities in hotels, motels, or other lodging properties subject to a security interest as provided in section 552(b) of this title , whether existing before or after the commencement of a case under this title.