Definition of gluten noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈɡluːtn//
; NAmE NAmE//ˈɡluːtn//
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a sticky substance that is a mixture of two proteins and is left when starch is removed from flour, especially wheat flour We sell a range of gluten-free products (= not containing gluten). Word Originlate 16th cent. (originally denoting ‘protein from animal tissue’): via French from Latin, literally ‘glue’.
See the Oxford Advanced American Dictionary entry: gluten