(Biology)(of an organism, e.g. a barnacle) fixed in one place; immobile (生)(生物体,如藤壶)固着的;固定的 ■(Botany & Zoology)(of a plant or animal structure) attached directly by its base without a stalk or peduncle (植,动)(植物或动物结构)无柄的 sporangia may be stalked or sessile. 芽孢囊可能有柄,也可能无柄。
语源
early 18th cent.: from Latin sessilis, from sess- 'seated', from the verb sedere