(Medicine)a bubble-like cavity filled with air or fluid, in particular (医)大泡,大水(或脓)疱,尤指 ■a large blister containing serous fluid 大(水)疱 ■an abnormal air-filled cavity in the lung 肺(气肿)大泡
(Anatomy)a rounded prominence (剖)圆凸物
a round seal attached to a papal bull, typically one made of lead (罗马教皇的)印玺(尤指铅制的)