ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷dēəm noun
( plural epicar·dia -ēə)
Etymology: New Latin, from epi- + -cardium (from Greek kardia heart)
1. : the visceral part of the pericardium that closely invests the heart
2. : a tubular posterior prolongation of the bronchial sac of certain compound ascidians that takes part in the process of gemmation