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Definitions

beta

[bey-tuh, bee-] / ˈbeɪ tə, ˈbi- /


Example Sentences

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Amyloid beta plaques and tau tangles are among the best known biological features of Alzheimer's disease.

From Science Daily Sep. 13, 2026

Serko did a closed beta launch of the product in the U.S. in May, and a broader U.S. open beta is on track for 3Q27.

From The Wall Street Journal Sep. 8, 2026

One important ingredient was TGF-b, transforming growth factor beta.

From Science Daily Aug. 25, 2026

And for those who don’t trade options, and who have what Emanuel calls “an AI-tilted portfolio”, some stocks with negative beta could be added so that “you and your portfolio will sleep better at night.”

From MarketWatch Aug. 24, 2026

Eventually alpha rays were identified as helium atoms stripped of their electrons—that is, helium nuclei-—and beta rays as energetic electrons.

From "Big Science" by Michael Hiltzik

Any beta higher than 1 means a stock is more volatile than the S&P 500, while betas of less than 1 are less wild.

From Barron's Dec. 1, 2025

Consider the performance of a hypothetical portfolio that buys the 10% of stocks with the highest betas and sells short the decile of stocks with the lowest betas.

From MarketWatch Oct. 23, 2025

“We’re betas pretending to be alphas,” Denton said.

From New York Times Nov. 3, 2022

If you missed out on those betas, you can at least get some idea of what the game will look like by watching some Overwatch League.

From The Verge Aug. 16, 2022

Greek letters move across the undersides of his eyelids: isosceles triangles, betas, sine curves.

From "All the Light We Cannot See" by Anthony Doerr




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