small of the back en · NOUN
Meanings
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The relatively narrow, lumbar region of the back.
The plan was not feasible, for making a ninety-degree turn would have been impossible without nickel-alloy swivels inserted in the small of every man's back, and Lieutenant Scheisskopf was not sanguine at all about obtaining that many nickel-alloy swivels from Quartermaster or enlisting the co-operation of the surgeons at the hospital.
1961 November 10, Joseph Heller, “McWatt”, in Catch-22 […], New York, N.Y.: Simon and Schuster, →OCLC, page 70:He remembered the smell of her skin in the overheated darkness of a coffin near the port, her fingers locked across the small of his back.
1984, William Gibson, Neuromancer (Sprawl; book 1), New York, N.Y.: Ace Books, →ISBN, page 9:
Synonyms
lower back · low back · lumbar