epididymis       
noun [ C ]  anatomy specialized uk/ˌep.ɪˈdɪd.ə.məs/ us/ˌep.əˈdɪd.ə.məs/  epididymides /ˌep.ɪˈdɪd.ɪ.miːz/ /ˌep.əˈdɪd.ɪ.miːz/
 附睪
a tube that carries sperm from the testes (= the two round male sex organs)
  Harmless cysts may occur in the epididymis. 附睾中可能生长良性胞囊。