cathode-ray tube: a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen
device: an instrumentality invented for a particular purpose
epsilon toxin: a bacterial toxin produced by clostridium perfringens; causes intense abdominal cramps and diarrhea that begins 8-22 hours after consumption of foods containing large numbers of these bacteria