Lewis & Short

sē-libra (e short, Mart. 4, 46, 7; 10, 57 1), ae, f. [semi], a half-pound, Cato, R. R. 84, 1; Varr. L. L. 5, § 171 Müll.; Col. 12, 5; Liv. 5, 47; Plin. 14, 16. 19, § 108; Mart. 1. 1.