hydropericardium

[ hī′drō-pĕr′ĭ-kärdē-əm ]

n.

The noninflammatory accumulation of watery fluid in the pericardial cavity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.