omasum (third compartment of a ruminant's stomach)

valve (biological)

Lamellibranchia; class of bivalves

petal; CL:片[pian4]

Douban, a Chinese social networking website

cotyledon of a bean or pea (i.e. either of the halves of a bean or pea); thick bean sauce (abbr. for 豆瓣醬|豆瓣酱[dou4 ban4 jiang4])

single petal; single valve

heart valve