pneumorrhachis

[ nōō′mə-rākĭs, nōō-môrə-kĭs ]

n.

The presence of gas in the spinal canal.pneumatorrhachis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.