Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
curvāmen, ĭnis, n. [curvo], a bending, bend, vaulting (not ante-Aug.; perh. first used by Ov.): patriae curvamina ripae, Ov. M. 9, 450; 2, 130; 3, 672: haec (villa) unum sinum molli curvamine amplectitur, Plin. Ep. 9, 7, 4: caeli, of the climate, Gell. 14, 1, 10.