lordosis

Etymology
From.

Noun

 * 1)  An excessive backwards curvature of the spine, causing a hollow in the back.
 * 2)  A body posture of some female mammals, indicating receptivity to copulation. It involves lowering of the forelimbs but with the rear limbs extended and hips raised, ventral arching of the spine and a raising, or sideward displacement, of the tail.

Translations

 * Czech: hyperlordóza
 * French:
 * Greek:
 * Norwegian: svaie ryggen
 * Polish: lordoza
 * Portuguese:
 * Spanish: lordosis
 * Swedish: svankrygg, lordos