acleistocardia a·cleis·to·car·di·a (ə-klī'stō-kär'dē-ə)
n.
An opening in the oval foramen of the heart.
| an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language. |
| opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England. |