Definition of pneumopericardium in US English:

pneumopericardium

noun

Medicine
  • The presence of air or gas in the pericardium. Also (more fully "artificial pneumopericardium"): the deliberate introduction of air or gas into the pericardium for therapeutic or diagnostic purposes (now rare).

Origin

Early 19th century; earliest use found in John Forbes (1787–1861), physician and medical journalist. From pneumo- + pericardium, after French pneumo-péricarde.

Pronunciation

pneumopericardium

/ˌnjuːmə(ʊ)pɛrɪˈkɑːdɪəm/