nonmediastinalWiktionary 原文英美构词拆解nonnon-前缀mediastinalmediastinal词干non-Used in the sense of no or none, to show lack of or failure to perform; or in the sense of not, to negate the meaning of the word to which it is prefixed.词源说明From non- + mediastinal.释义形容词adjective1Not mediastinal.