mediastinum

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus

From New Latin mediastīnum, from Medieval Latin mediastīnus (“middling; middle”), from Latin mediastīnus (“a common servant”).

There was no evidence of injury of the mediastinum and its contents. — Report of the President's Commission on the Assassination of President John F. Kennedy, United States. Warren Commission
Logical and progressive conclusions drawn from experience, and based upon the local enlargement which the physicians previously consulted have apparently failed to perceive, lead me to diagnose the presence of a tumour in the mediastinum, extending its claws into the lungs, and seriously impeding their action and the action of the heart. — The Dop Doctor, Richard Dehan

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