noun
the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement
• Syn: ↑pericardial space
• Hypernyms: ↑cavity, ↑bodily cavity, ↑cavum
* * *
noun1. : the fluid-filled space between the two layers of the vertebrate pericardium
2. : pericardium 2
Useful english dictionary. 2012.