an oily substance found naturally in human skin cells and in the liver (= an organ that cleans the blood) of sharks (= large fish with sharp teeth). It is one of the substances used to make moisturiser (= a substance put on the skin to stop it becoming dry).

Squalene is present in the oil in fingerprints. 指纹带的油脂中含有角鲨烯。

Moisturizers containing jojoba or squalene soften and smooth the skin, keeping it free of dry patches and lines, and reducing wrinkles. 含有荷荷芭油和角鲨烯的湿润剂可使皮肤变得柔软润滑，不出现干燥的斑块或线条，并减少皱纹。