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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The body needs adequate levels of vitamin C for proper immune function. Carrie Madormo, Verywell Health, 9 Jan. 2026 Many people enjoy lemon water in the morning to support hydration, vitamin C intake, and digestion. Merve Ceylan, Health, 8 Jan. 2026 Mango is also high in other immune-boosting, inflammation-lowering nutrients, such as vitamin C, vitamin E, and folate, says Shah. Kirsten Nunez, Martha Stewart, 7 Jan. 2026 The seeds, called arils, are full of vitamin C and potassium. Mary Ann Esposito, Boston Herald, 7 Jan. 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 11 Jan. 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

More from Merriam-Webster on vitamin C

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