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lor·do·sis

lordosis

 
pronunciation:
lor do sihs
part of speech: noun
definition 1: the normal inward curvature of the cervical and lumbar regions of the spine.
definition 2: an abnormally exaggerated inward curvature of the cervical and lumbar regions of the spine.
definition 3: a mating posture of some female mammals, such as the rat, in which the back is arched downward.