pericardial cavity pericardial • pericardial sac · · · Info · Definitions · Synonyms · Characters · · pericardial cavity · · Text Common · · Latin · · Scripts 18 · · Length 7 · · Syllables Definitions · · · (noun) the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement. Synonyms: pericardial cavity, pericardial space. · · Noun Definition 1 Synonyms · · · pericardial space · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 v latin small letter v U+0076 y latin small letter y U+0079