granule

詳細解釋：

gran.ule

n.（名詞）
A small grain or pellet; a particle.
小顆粒或小團；微粒
Geology A rock or mineral fragment larger than a sand grain and smaller than a pebble, between 2 and 4 millimeters in diameter.
【地質學】 小粒：比沙粒大且比卵石小的岩石或礦物的碎片，直徑2-4毫米
Astronomy One of the small, transient, brilliant markings in the photosphere of the sun.
【天文學】 耀斑：太陽光球層的小的、短暫的亮斑
Biology A cellular or cytoplasmic particle, especially one that stains readily.
【生物學】 微粒：細胞或細胞質的微粒，尤指易受污染的

來源：
Late Latin gr3nulum
後期拉丁語 gr3nulum
diminutive of Latin gr3num [grain] * see g—…-no-
拉丁語 gr3num的小後綴 [顆粒] *參見 g—…-no-