In Spanish and Mexican law. An annuity. A ground rent. The right which a person acquires to receive a certain annual peusion, for the delivery which he makes to another of a determined sum of money or of an immovable thing. Civ. Code Mex. art 3206. See Schm. Civil Law, 149, 309; White, New Itecop. bk. 2, c. 7,