PERICARDIUM Meaning of PERICARDIUM in English n. (pl. pericardia) the membranous sac enclosing the heart. pericardiac adj. pericardial adj. pericarditis n.[ mod.L f. Gk perikardion (as PERI- + kardia heart) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012