coal tar

noun

: tar obtained by distillation of bituminous coal and used especially as an industrial fuel, in making dyes, and in the topical treatment of skin disorders

Examples of coal tar 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.
Vanillin can be obtained from cheaper sources, like eugenol and lignin, but the overwhelming majority of it is derived from petrochemicals, such as petroleum and coal tar. Sarah Jampel, Bon Appetit Magazine, 28 July 2025 By helping to remove that scaling, salicylic acid shampoo allows other medicated treatments, like corticosteroids or coal tar, to penetrate the scalp and work more effectively. Jenny Berg, Allure, 17 May 2025 During the 2013 conclave that elected Pope Francis, the black smoke was produced using a mixture of potassium perchlorate, anthracene (a component of coal tar) and sulfur. Greta Cross, USA Today, 8 May 2025 During last conclave in 2013, which ended with the election of Francis, the black smoke was a mixture of potassium perchlorate, anthracene (a component of coal tar) and sulfur. Jeanine Santucci, USA Today, 4 May 2025 See All Example Sentences for coal tar

Word History

First Known Use

1785, in the meaning defined above

Time Traveler
The first known use of coal tar was in 1785

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Cite this Entry

“Coal tar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coal%20tar. Accessed 21 Aug. 2025.

Kids Definition

coal tar

noun
: tar obtained from bituminous coal and used especially in making drugs and dyes

Medical Definition

coal tar

noun
: tar obtained by distillation of bituminous coal and used in the treatment of some skin diseases by direct local application to the skin

More from Merriam-Webster on coal tar

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