squalene

noun

squa·​lene ˈskwā-ˌlēn 

: 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)

Examples of squalene in a Sentence

Recent Examples on the Web

Skin-loving ingredients such as SPF 40, hyaluronic acid, and squalene help improve complexion appearance over time. —Ariana Yaptangco, Glamour, 18 Nov. 2025

Yellow armpit stains in white clothing are typically caused by oleic acid and an organic compound known as squalene, which are found in our sweat and skin oils. —New Atlas, 5 Sep. 2025

This makeup remover helps maintain hydration, thanks to tangerine peel extract, squalene, and a blend of traditional Korean oils such as pine nut oil, camellia seed oil, and plum seed oil. —Iman Balagam, Vogue, 3 Sep. 2025

Unfortunately, that notorious fabric yellowing is often unavoidable due to the combination of oleic acid, squalene, and other organic compounds found in your skin oil and sweat. —Andrew Paul, Popular Science, 3 Sep. 2025

Word History

Etymology

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

First Known Use

1916, in the meaning defined above

Medical Definition

squalene

noun

squa·​lene ˈskwā-ˌlēn 

: 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)