vitamin A
noun
: any of several fat-soluble vitamins (such as retinol) that are found especially in green or orange vegetables (such as carrots or spinach) and in animal products (such as egg yolk, butter, or liver) and whose deficiency in the animal body causes epithelial tissues to become keratinous (as in the eye with resulting visual defects)
Examples of vitamin A in a Sentence
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Although the World Health Organization recommends people with measles receive two doses of vitamin A to lessen the risk of complications, that advice is directed at children in low-resource countries with high rates of vitamin A deficiencies.
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Lisa Jarvis, Mercury News, 12 Apr. 2025
Isotretinoin is a potent derivative of vitamin A that shrinks oil glands in the face, chest, back, shoulders and upper arms, says Dr. Richard Antaya, director of pediatric dermatology for Yale Medicine.
—Caroline C. Boyle, USA Today, 11 Apr. 2025
Alcohol also amplifies breast cancer risk by reducing levels of vitamin A, a compound that regulates estrogen.
—Pranoti Mandrekar, The Conversation, 7 Apr. 2025
Tretinoin, also known as all-trans retinoic acid, is a type of retinoid, a group of vitamin A derivatives that includes retinol.
—Emily Orofino, Vogue, 5 Apr. 2025
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Lisa Jarvis, Mercury News, 12 Apr. 2025
Isotretinoin is a potent derivative of vitamin A that shrinks oil glands in the face, chest, back, shoulders and upper arms, says Dr. Richard Antaya, director of pediatric dermatology for Yale Medicine.
—Caroline C. Boyle, USA Today, 11 Apr. 2025
Alcohol also amplifies breast cancer risk by reducing levels of vitamin A, a compound that regulates estrogen.
—Pranoti Mandrekar, The Conversation, 7 Apr. 2025
Tretinoin, also known as all-trans retinoic acid, is a type of retinoid, a group of vitamin A derivatives that includes retinol.
—Emily Orofino, Vogue, 5 Apr. 2025
See All Example Sentences for vitamin A
Cite this Entry
“Vitamin A.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20A. Accessed 25 Apr. 2025.
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