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sitosterol

American

[sahy-tos-tuh-rawl, -rol] / saɪˈtɒs təˌrɔl, -ˌrɒl /

noun

Chemistry.

any of five steroid alcohols having the formula C 2 2 H 5 0 O, especially the beta form, obtained from various plant sources: used in organic synthesis.

sitosterol British

/ saɪˈtɒstəˌrɒl /

noun

a white powder or waxy white solid extracted from soya beans, consisting of a mixture of isomers of the formula C 29 H 50 O with other sterols: used in cosmetics and medicine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sitosterol

First recorded in 1915–20; sito- + sterol

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The analysis showed that both Beta sitosterol and Succinic acid had favorable profiles, suggesting they could be absorbed well and are unlikely to be toxic at therapeutic levels.

From Science Daily • Feb. 8, 2026

"These results highlight the potential of Beta sitosterol as a dual inhibitor, which could be crucial in managing Alzheimer's disease," said Khedraoui.

From Science Daily • Feb. 8, 2026

Among all the compounds tested, Beta sitosterol stood out.

From Science Daily • Feb. 8, 2026

Phytosterol is not a single alcohol, but a mixture of at least two, which have been separated and studied as sitosterol, C27H43OH, and stigmasterol, C30H49OH.

From The Chemistry of Plant Life by Thatcher, Roscoe Wilfred

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023