squalene

noun squa·lene \ ˈskwā-ˌlēn \

Definition of squalene

: an acyclic hydrocarbon C₃₀H₅₀ that is widely distributed in nature (such as a major component of sebum and in shark-liver oils) and is a precursor of sterols (such as cholesterol)

Recent Examples of squalene from the Web

Shark liver oil, known as squalene, is used in cosmetics and health supplements such as omega-3 pills, accounting for 3 million shark deaths a year.

— simon denyer, Washington Post, "Even as China turns away from shark fin soup, the prestige dish is gaining popularity elsewhere in Asia," 15 Feb. 2018
There are several antioxidants at play to boost skin radiance, and in addition to the prickly pear, squalene and aloe moisturize to relieve a dry, irritated face.

— ashley weatherford, The Cut, "Are You Ready for Succulent Skin Care?," 1 Feb. 2018
The catechin found in green tea, EGCG3, lends anti-inflammatory properties, along with fellow antioxidants carnosine and bacopa; squalene helps support barrier function.

— laura regensdorf, Vogue, "Introducing the Chic, No-Fuss Skin-Care Line You Need Now," 29 Sep. 2017
For full body coverage, a sunscreen oil such as Zelens Body Defence SPF 30 is a game-changer, providing water-resistant sun protection packed with antioxidants, squalene, and grape-seed oil.

— micere johnson, Vogue, "The Best Sunscreens for Women of Color to Buy Now," 21 July 2017
As for which actual sheet masks to use, look specifically for ones with ceramides, squalene, hyaluronic acid, rice bran oil, and macadamia oil, Jaliman suggests.

— devon abelman, Allure, "Using a Sheet Mask Every Day Is Actually Good for Your Skin," 10 July 2017
Squalane's the stable, saturated form of squalene oil, which Dr. King says also keeps it free from degrading à la argan or almond oil (which lose their benefits after too long on your vanity).

— rachel nussbaum, Glamour, "Squalane Is the Best Face Moisturizer for Summer's Sticky Humidity," 1 June 2017
Let the botanicals (with scents like primrose, squalene, and sleep-inducing lavender) encourage a restful night’s sleep … then wake up to brighter, fully restored skin by morning.

— vanity fair, Vanities, "A Few of the Best Facial Oils to Add to Your Routine," 26 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'squalene.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of squalene

International Scientific Vocabulary, from Latin squalus, a sea fish — more at whale

NEW! Time Traveler

First Known Use: 1916

in the meaning defined above

See Words from the same year

Medical Dictionary

squalene

noun squa·lene \ ˈskwā-ˌlēn \

medical Definition of squalene

: an acyclic hydrocarbon C₃₀H₅₀ that is widely distributed in nature (as a major component of sebum and in shark-liver oils) and is a precursor of sterols (as cholesterol)