di·​ol ˈdī-ˌōl How to pronounce diol (audio)
: a compound containing two hydroxyl groups

Examples of diol in a Sentence

Recent Examples on the Web The Louisville health department recommends insect repellants with long lasting ingredients like DEET, picaridin, IR3535, and some oil of lemon eucalyptus and para-menthane-diol. Sarah Ladd, The Courier-Journal, 20 Aug. 2021 When exploring the great outdoors, the CDC suggests wearing a repellant that contains ingredients like DEET, picaridin, IR3535, oil of lemon eucalyptus, para-menthane-diol (PMD), or 2-undecanone. Patia Braithwaite, SELF, 26 July 2019 Insect repellent should include either DEET, picaridin, IR3535, lemon eucalyptus oil or para-menthane-diol. Rose Minutaglio, PEOPLE.com, 3 July 2019 If parts of your skin are exposed, than opt for using repellant products that are registered with the Environmental Protection Agency as safe such as DEET, IR3535, picardin, oil of lemon eucalyptis and or para-menthane-diol (PMD). Gabriela Moraru, M.d., miamiherald, 4 June 2018 Lemon eucaklyptus oil or para-menthane-diol (PMD) should also be avoided in children less than 3 years of age. Gabriela Moraru, M.d., miamiherald, 4 June 2018 Furthermore, products containing oil of eucalyptus or para-menthane-diol should be avoided in children younger than 3-years-old. Philly.com, 16 May 2018 How to prevent West Nile virus Use repellents containing DEET, picaridin, IR3535, oil of lemon eucalyptus or para-menthane-diol. Ginger Christ, cleveland.com, 20 Sep. 2017 Ethoxylated acetylenic diolsOfficially called a surfactant, this modifies the surface tension of the water and dyes: Patrick Di Justo, WIRED, 26 Apr. 2011

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'diol.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary

First Known Use

1920, in the meaning defined above

Time Traveler
The first known use of diol was in 1920

Dictionary Entries Near diol

Cite this Entry

“Diol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diol. Accessed 21 Apr. 2024.

Medical Definition


: a compound containing two hydroxyl groups

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