mediastinum
C2CEFR level
85/100Rarity: very rare
TechnicalRegister
The central compartment of the thorax between the lungs, containing the heart, great vessels and other structures.
A widened mediastinum on the film raised concern for aortic pathology.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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