(pathology) Backache of the lumbar region or lower back, which can be caused by muscle strain or a slipped disk.
1935, w, The Norwich Victims Chapter 7/2, The two Gordon setters came obediently to heel. Sir Oswald Feiling winced as he turned to go home. He had felt a warning twinge of lumbago.
1954, Gilbert Ryle, Dilemmas: The Tarner Lectures, 1953, dilemma vii: Perception, page 105 (The Syndics of the Cambridge University Press)We may imagine an athletics coach with a scientific training researching into the physiology and the psychology of runners. ... He finds out the effects of fatigue, of alcohol, of tobacco, of lumbago and of depression upon their performances.
