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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All of the product names are fun nods to Old Hollywood, like Camera Ready, a hydrating primer; Luminous Brightening, a vitamin C cream-serum; Satin Resurfacing, an AHA/PHA exfoliating serum; and Take One Cleansing Honey, a facial cleanser. Celia Shatzman, Forbes.com, 1 June 2026 First is glycolic acid to exfoliate dead skin cells, soothing green tea extract to help with excess oils, coQ10 to improve texture, and vitamin C to fade dark spots. Reece Andavolgyi, InStyle, 31 May 2026 Ahead, an edit of the leading Korean vitamin C serums to know. Rosa Jisoo Pyo, Vogue, 31 May 2026 The Cleveland Clinic says drinking lemon water in the morning boosts your vitamin C and antioxidant intake. Yolanda Harris, AJC.com, 28 May 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 4 Jun. 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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