in botany, a genus of the didynamia angiospermia clas. The calyx consists of two leaves; and the pod is linear and unilocular. There are four species, three of which are natives of Britain, viz. the majus, or celandine; the glaucium, or yellow horned poppy; and the hybridum, or violet-colored horned poppy. The leaves and root of the majus, or celandine, are stimulating, aperient, diuretic, and sudorific: It is peculiarly recommended in the slow kind of jaundice, where there are no symptoms of inflammation, and in dropsies.