IPA: /ˌmiːdiəˈstaɪnəl/
KK: /ˌmidiəˈstīnəl/
Relating to the mediastinum, which is the area in the chest between the lungs that contains the heart, aorta, esophagus, and other structures.
The doctor explained that the mediastinal space is important for various medical conditions.
Mediastinal → It is formed from "mediastinum" (from Latin, meaning the space between) and the suffix "-al" (meaning pertaining to). The word "mediastinal" refers to something that pertains to the mediastinum, the central compartment of the thoracic cavity between the lungs.
Think of the term 'mediastinum' which means the space between, and remember that 'mediastinal' refers to anything related to that central space in the chest.