mediastinum
me·di·as·ti·num
noun \ˌmē-dē-ə-ˈstī-nəm\ plural me·di·as·ti·na\-nə\
Definition of MEDIASTINUM
: the space in the chest between the pleural sacs of the lungs that contains all the tissues and organs of the chest except the lungs and pleurae; also : this space with its contents
— me·di·as·ti·nal \-ˈstī-nəl\ adjective
Origin of MEDIASTINUM
New Latin, from Medieval Latin, neuter of mediastinus medial, from Latin medius
First Known Use: 1541
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