From the rear—particularly where his vertebrae were visible—he might almost have passed for one of those needy metropolitan children who are sent out every summer to endowed camps to be fattened and sunned.
There are no more uses of "vertebrae" in the book.
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While making a tackle, the C3 and C4 vertebrae in his spinal cord were telescoped.
Naked from the waist up, his vertebrae extruded from his skinny back as he hunched over the desk, working.