名詞 aster:

1. any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers
2. star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis

as.ter

n.（名詞）
Any of various plants of the genusAster in the composite family, having radiate flower heads with white, pink, or violet rays and a usually yellow disk.
紫菀屬植物：一種菊科紫菀 屬的植物，有帶白、粉、或藍紫色傘形放射狀頭狀花序，花盤一般為黃色
The China aster.
翠菊
Biology A star-shaped structure formed in the cytoplasm of a cell and having raylike fibers that surround the centrosome during mitosis.
【生物學】 星狀體：在細胞漿內形成的星狀結構，在有絲分裂期間有棱形纖維環(huán)繞中心體

來源：
Latin astôr [a plant, star]
拉丁語 astôr [植物，星]
from Greek astôr * see ster- 3
源自 希臘語 astôr *參見 ster- 3