cymen.聚伞花序CYabbr.历年（=calendar year）cyclopropylidenen.亚环丙基Cytauxzoon felis一种原虫, 可使家猫患致死Cyclophosphumide环磷酰胺cytokine cascade细胞因子级联系统Cyanamide/tox氰胺／毒性cyclocitronelloln.环香茅醇cyclopropylaminen.环丙胺Cyathus colensoin.柯氏黑蛋巢Cyathus confususn.紊乱黑蛋巢Cyrtomium tengiin.世纬贯众