vitamin C

noun

: a water-soluble vitamin C6H8O6 found in plants and especially in fruits and leafy vegetables or made synthetically and used in the prevention and treatment of scurvy and as an antioxidant for foods

called also ascorbic acid

Examples of vitamin C in a Sentence

Recent Examples on the Web
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Sodium hyaluronate draws in moisture to temporarily soften lines, while ascorbyl glucoside, a vitamin C derivative, brightens uneven tone. Emily Orofino, Allure, 15 Sep. 2026 Its uniquely oil soluble form of vitamin C weightlessly absorbs to instantly boost radiance while remaining gentle on skin. ABC News, 14 Sep. 2026 Key Takeaways Watermelon rinds are low in calories and provide fiber, potassium, vitamin C, folate, and citrulline. Stephanie Brown, Verywell Health, 10 Sep. 2026 The dual-phase formula includes collagen, niacinamide, and vitamin C to strengthen the skin barrier, improve elasticity, fade dark spots, and smooth wrinkles. Reece Andavolgyi, InStyle, 9 Sep. 2026 See All Example Sentences for vitamin C

Word History

First Known Use

circa 1920, in the meaning defined above

Time Traveler
The first known use of vitamin C was circa 1920

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Cite this Entry

“Vitamin C.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20C. Accessed 17 Sep. 2026.

Kids Definition

vitamin C

noun
: a vitamin that is present especially in citrus fruits, tomatoes, and green vegetables and is needed by the body to prevent scurvy

called also ascorbic acid

Medical Definition

vitamin C

noun
: a water-soluble vitamin C6H8O6 found in plants and especially in fruits and leafy vegetables or made synthetically and used in the prevention and treatment of scurvy and as an antioxidant for foods

called also ascorbic acid

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