1. (n.) A curvature of the spine forwards, usually in the lumbar region.

2. (n.) Any abnormal curvature of the bones.

bowlegs cleft palate clubfoot crookback defacement deformation deformity disfigurement flatfoot freakishness harelip humpback hunchback knock-knee kyphosis lordosis malconformation malformation misproportion misshape monstrosity mutilation splayfoot swayback talipes teratology torticollis truncation valgus wryneck