denotes a corroding ulcer.

PHAGÆNIC MEDICINES, those used to eat of fungous or proud flesh: such are all the caustics.

PHALÆNA, in zoology, a genus of insects belonging to the order of lepidoptera. The feelers are serraceous, and taper gradually to the points; the wings are often bent backwards; and the species of this genus fly about in the night. There are no less than 460 species, comprehending all the moths.