山梨酸：在欧洲花楸Sorbus aucuparia的浆果和其它许多植物中见到的一种化合物，能抑制酵母菌和霉菌的生长，用作抗菌防腐剂- extradural
- extraembryonic
- extraepiphyseal
- extragenital
- extrahepatic
- extraligamentous
- extramalleolus
- extramastoiditis
- extramedullary
- extrameningeal
- extramitates
- extramural
- extraneous
- extranuclear
- extraocular
- extraosseous
- extraparenchymal
- extrapelvic
- extrapericardial
- extraperineal
- extraperiosteal
- extraperitoneal
- extraplacental
- extraplantar
- extrapleural