Noun:

1. any of various deciduous or evergreen shrubs of the genus Hydrangea

hydrae难以根除的祸害,水螅hydran.（希腊神话中的）九头蛇；难以根除之祸害；水螅Hydra.n.长蛇星座hydrazines propellant肼类推进剂Hydrargyrum pollution汞污染hydrazine monohydrate水合肼hydrargyri mononitras[医] 硝酸亚汞hydrazine perchlorate高氯酸肼hydration-resistant耐水合Hydra peseudoligactis水螅Hydrangea coenobialisn.酥醪绣球Hydrangea macrophyllan.绣球hydrazinolysis method肼解法