In this Part I of this subtitle the following words have the meanings indicated. “Attorney trust account” means an account that a lawyer or law firm maintains at a financial institution for the deposit of trust money. “Attorney trust account” includes an escrow account. “Beneficial owner” means a person, other than the client of a lawyer, for whose benefit a lawyer is entrusted to hold trust money. “Trust money” means a deposit, payment, or other money that a person entrusts to a lawyer to hold for the benefit of a client or a beneficial owner.