[lor.do.sis] n [NL, fr. Gk lordosis, fr. lordos curving forward; akin to OE belyrtan to deceive] (1704) 1: abnormal curvature of the spine forward
2: a mating posture of some sexually receptive female mammals (as rats) in which the head and rump are raised and the back is arched downward -- lor.dot.ic adj