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binus bina, binum ADJ :: 2 by 2; 2 each; in pairs; 2 at time; on 2 occasions; double, twofold
bīnus: a, um, v. bini.
bīnus,⁹ a, um (sing. de bini ), double : Lucr. 5, 879.
bīnus, a, um, s. bini.