: a breakfast cereal of Swiss origin consisting of rolled oats, nuts, and fruit
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Merriam-Webster unabridged
borrowed from Swiss German Müesli, diminutive of Mues "soft food, mush, pulp," going back to Old High German muos, going back to West Germanic *mōsa- "food, soft food" (whence Old Saxon, Old English & Old Frisian mōs "food, prepared food"), probably from *mōt-, lengthened grade derivative of *mati- "food" + a suffixal -t- — more at meat
1939, in the meaning defined above
“Muesli.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/muesli. Accessed 18 Jul. 2025.
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