ăduncĭtas — Lewis & Short
ăduncĭtas, ātis, f.aduncus,
I the curvature of a point inwards, hookedness, aduncity: rostrorum, * Cic. N. D. 2, 47, 122; so,
rostri,Plin. 8, 27, 41, § 97; 10, 71, 91, § 196.