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monosodium glutamate mon·o·so·di·um glutamate (mŏn'ə-sō'dē-əm)
Abbr. MSG A white odorless crystalline compound that is a salt of glutamic acid; it is used as a flavor enhancer in foods, an aplication that may cause Chinese restaurant syndrome in sensitive people, and used intravenously as an adjunct in treating encephalopathies associated with liver disease.