mediastinum

/หŒmiหdi.ษ™หˆstaษชnษ™m/

IPA: /M IY1 D IY0 AH0 S T AH0 N AH0 M/

noun
  1. 1

    The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs.

Source: https://en.wiktionary.org/wiki/mediastinum