Source : Webster's Revised Unabridged Dictionary (1913)

Lordosis \Lor*do"sis\, n. [NL., fr. Gr. ?, fr. ? bent so as to
   be convex in front.] (Med.)
   (a) A curvature of the spine forwards, usually in the lumbar
       region.
   (b) Any abnormal curvature of the bones.

Source : WordNet®

lordosis
     n : an abnormal inward (forward) curvature of the vertebral
         column [syn: {hollow-back}]