释义 |
‖ mediastinum Anat.|ˌmiːdɪəˈstaɪnəm| Pl. -a. [mod.L., neut. of med.L. mediastīnus, medial, intermediate, f. medius middle, after the classical L. mediastīnus (also mediastrīnus) n., inferior servant, drudge.] A membranous middle septum or partition between two cavities of the body; esp. that formed by the two inner walls of the pleura, separating the right and left lungs. anterior mediastinum: the part of the mediastinum extending from the pericardium to the sternum. middle m.: ‘the enlarged central portion of the whole space between the pleuræ’ (Syd. Soc. Lex.). posterior m.: the portion of the mediastinum between the pericardium and the lower dorsal vertebræ. superior m.: the space between the manubrium of the sternum and the upper dorsal vertebræ. In medical Latin the name is used, with qualifications, to denote certain other structures to which its etymological meaning is appropriate; as mediastinum auris, the membrane of the drum of the ear; m. cerebri, m. cerebelli, synonyms of falx cerebri and cerebelli (see falx); m. testis, Sir Astley Cooper's name for the septum of the testicle (Corpus Highmori).
1541R. Copland Guydon's Quest. Chirurg. H j, With the mediastinum wherwith it [the hert] is steyed and strengthed. 1615Crooke Body of Man 360 The Pericardium toucheth not the Lunges but by the interposition of the Mediastinum. 1797M. Baillie Morb. Anat. (1807) p. xxv, The Posterior Mediastinum. 1878T. Bryant Pract. Surg. I. 49 Pericarditis or suppurative inflammation of the mediastinum. |