HYPOPYON Meaning of HYPOPYON in English /huy poh"pee on', hi-/ , n. Ophthalm.an effusion of pus into the anterior chamber of the eye. [ 1650-60; HYPO- + Gk pýon pus, discharge from a sore ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012