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An unsaturated aliphatic hydrocarbon, C30H50, that is the biosynthetic acyclic precursor to tetracyclic steroids such as cholesterol. It is widely found in animals, plants, and fungi and is present in high concentrations in shark liver oil and human sebum.
[New Latin Squalus, shark genus (from its occurrence in the liver oil of sharks) (from Latin squalus, a sea fish) + -ene.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biochemistry) biochem a terpene first found in the liver of sharks but also present in the livers of most higher animals: an important precursor of cholesterol
[C20: from New Latin squalus genus name of the shark]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
an oil, C30H50, intermediate in the synthesis of cholesterol, obtained for use in manufacturing pharmaceuticals.
[1925–30; < New Latin Squal(us) a genus of sharks (the liver of which yields the oil), Latin: a kind of fish + -ene]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.