外囊

1.capsulaexterna  2.ectocyst  

外的英语翻译：

besides; in addition; not closely related; other; outer; outside; unofficial
【医】 ec-; ecto-; exo-; extra-; xeno-

囊的英语翻译：

bursa; purse; theca; vesica
【医】 accessory pocket; bag; balloon; bladder; bursa; Capsul; capsula
capsulae; capsule; cyst; cyst-; cysti-; cystido-; cystis; cysto-
hydatid; kysto-; pouch; sac; sacci; saccus; Ves.; Vesic.; vesica
vesicle; vesico-