Med. Obs. [mod.L., a. Gr. ἐπινυκτίς, f. ἐπί + νύξ night.] A pustule, or an eruption, that appears only at night.
1676. R. Wiseman, Chirurg. Treat., I. viii. 44. Epinyctis and Terminthus; a couple of angry Pustules affecting the Skin in the Arms, Hands, and Thighs.
