Lewis & Short

ănătīnus, a, um, adj. [anas], of or pertaining to the duck: Utinam fortunam nunc [ego] anatinam uterer, Uti quom exivissem ex aquā, arerem tamen, * Plaut. Rud. 2, 6, 49.
Hence, ănătīna, ae, f. (sc. caro), duck-flesh, duck, Petr. 56, 3.