secretion
/sɪˈkri:ʃn; sɪ`kriʃən/ n
(fml 文)
1 [U] secreting (secrete 1) or being secreted 分泌
the secretion of bile by the liver 肝脏分泌出的胆汁.
2 [C] substance that is secreted, eg saliva, bile, etc 分泌物（如唾液、 胆汁等）.
3 [U] secreting (secrete 2) or being secreted 隐藏; 藏匿.