Noun | 1. | mercury poisoning - a toxic condition caused by ingesting or inhaling mercury; acute mercury poisoning causes a metallic taste and vomiting and diarrhea and kidney problems that may lead to death intoxication, poisoning, toxic condition - the physiological state produced by a poison or other toxic substance Minamata disease - a form of mercury poisoning among people who ate fish from mercury-contaminated waters of Minamata Bay off Japan in the 1950s; characterized by severe neurological degeneration |