spher·ule /ˈsfɪru(ə)l, ˈsfɛr, ˌju(ə)l/ 小球,小球體
Spher·ule n. A little sphere or spherical body; as, quicksilver, when poured upon a plane, divides itself into a great number of minute spherules. ◄ ►
spherule n : a small sphere