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

Designed for use in the morning and evening, the lightweight moisturizer is packed with nourishing ingredients, including prebiotics, hyaluronic acid, apple, watermelon, peptides, and squalene. —Melony Forcier, InStyle, 30 Jan. 2026

The lightweight, deeply hydrating and nourishing cream has antioxidants, squalene, and ceramides. —Brianna J. Heath, Essence, 20 Jan. 2026

The rich cream is made with squalene, guarana extract, and cupuacu butter, ingredients known to moisturize, hydrate, and smooth skin. —Katrina Cossey, Parents, 15 Jan. 2026

For example, oleic acid from cooking, squalene from human skin and bisphenol A from hard plastics can remain on surfaces for years if undisturbed. —Katelyn Richard, The Conversation, 9 Jan. 2026

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)