sway-back noun & adjective. ['sweɪbak] L19.
[Back-form. from SWAY-BACKED.]
A. noun.
1. An inward curvature of the spine or back, esp. as caused by strain or old age; the condition characterized by this, lordosis; an animal, esp. a horse, having this condition. L19.

2. Veterinary Medicine. A copper deficiency syndrome affecting the nervous system of young lambs, causing paralysis. Also called renguerra. M20.
b. adjective. Having a sway-back; fig. concave, having a concave part. L19.

[TahlilGaran] English Dictionary ▲