hydropneumopericardium

[ hī′drō-nōō′mō-pĕr′ĭ-kärdē-əm ]

n.

The accumulation of serous fluid and gas in the pericardial sac.pneumohydropericardium
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.