meta·se·quoia /-sɪˈkwɔɪə/
水杉
metasequoia
n : large fast-growing Chinese monoecious tree having flat
bright-green deciduous leaves and small globular cones;
commonly cultivated in United States as an ornamental;
known as a fossil before being discovered in China [syn:
dawn redwood, Metasequoia glyptostrodoides]