Ceramide

Part of speech: noun

Pronunciation: /ˈsɪɹ.əˌmaɪd/

Definitions

1. A lipid molecule that plays a critical role in cellular structure and membrane integrity while supporting moisture retention and protecting the skin barrier
2. A type of lipid that contributes to cell structure and membrane stability, aids in hydration retention, and serves to fortify the skin's protective barrier
3. This lipid compound is essential for maintaining cell membranes, retaining skin moisture, and enhancing the protective function of the skin barrier

Etymology: Ceramide is a chemical coinage, not an ancient word, and its name holds two possible sources. One is "cerebroside," a related class of brain lipids, blended with "amide," the chemical term for a compound containing a nitrogen-carbon bond linked to a carbonyl group. The other is Latin "cera," meaning wax, combined with "amide." The wax derivation is plausible because ceramides are waxy lipids, but the blend with "cerebroside" is the more commonly cited explanation for the name's construction. The word belongs to modern biochemistry, built from existing scientific parts rather than inherited from classical texts. Its "-amide" ending marks the molecule as containing an amide group, a structural feature that chemists use to name a large family of organic compounds. Lipids of this kind are fatty molecules, and the amide link is what connects the fatty acid chain to a sphingoid base in the molecule's core.