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.
Always check with a healthcare provider before using a vitamin C supplement for blood pressure or other health needs. Vanessa Caceres, Verywell Health, 31 Mar. 2026 Similarly, vitamin C remains a staple for protecting against environmental damage. Claire Dodds, MSNBC Newsweek, 30 Mar. 2026 Featuring the dynamic duo of vitamin C and retinol, boosted by the power of vitamin B3 (niacinamide) and salicylic acid, along with soothing organic aloe vera, squalane, hyaluronic acid, MSM and rose hip oil to rejuvenate, nourish and target uneven skin tone. Tory Johnson, ABC News, 28 Mar. 2026 Designed with a blend of advanced filters, including stainless steel mesh and activated carbon, Aquabliss’ Shower Filter purifies your water and enriches it with vitamin C and tourmaline, revealing softer skin and glossier strands. Lily Wohlner, Allure, 25 Mar. 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

Browse Nearby Words

Cite this Entry

“Vitamin C.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20C. Accessed 2 Apr. 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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster