capsule
noun [ C ] uk/ˈkæp.sjuːl/ us/ˈkæp.səl/
(MEDICINE)
胶囊
a small container with medicine inside that you swallow
(SPACECRAFT)
密封舱，太空舱
the part of a spacecraft in which the people on it live
(IN THE BODY)
medical specialized（包围器官、关节或其他结构的）囊，被膜
a flexible (= not stiff or fixed) structure surrounding an organ, joint, or other structure in the body