cycasn.[植]铁树；苏铁；凤尾松CYabbr.历年（=calendar year）cyclooligomerizationn.环齐聚合Cyclosonis terminansn.顶育毛蕨cyanidin diglycoside矢车菊素双糖甙Cylindrocystis obesan.肥壮柱胞鼓藻Cyanobacterial bloom蓝藻水华cytological zonation细胞学分区Cyrtophora cicatrosan.后带云斑蛛cyanopropylene oxide氧化氰基丙烯Cymbella cymbiformisn.新月桥弯藻cytogenetic analysis生殖系统