Definition of GI abbreviation from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌdʒiː ˈaɪ//
; NAmE NAmE//ˌdʒiː ˈaɪ//
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Glycaemic Index (= a system for measuring the effect of foods containing carbohydrates on the level of sugar in the blood) The diet is based mainly on low GI foods. Word Origin1930s (originally denoting equipment supplied to US forces): abbreviation of government (or general) issue.
See the Oxford Advanced American Dictionary entry: GI