phantogeusia

phan·to·geu·sia .fan-tə-'gyü-zē-ə, -'jü-, -sē- n an often metallic or salty taste in the mouth for which no external stimulus can be found

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phan·to·geu·sia (fan″to-gooґzhə) a parageusia consisting of continuous abnormal taste in the mouth, usually metallic or salty, in the absence of any external stimulus.