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Definitions

deleterious

[del-i-teer-ee-uhs] / ˌdɛl ɪˈtɪər i əs /


Example Sentences

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This leads to dehydration and eventually “desertification”—a phenomenon the film tracks across a quasi-equatorial band of the Earth, where deforestation in pursuit of farmland has had a deleterious effect.

From The Wall Street Journal ● Jun. 2, 2026

Demand destruction is among the many deleterious consequences of oil near $100 a barrel, said Pavel Molchanov, investment strategy analyst at Raymond James.

From MarketWatch ● Apr. 14, 2026

"Those beneficial mutations in the old environment might become deleterious in the new environment."

From Science Daily ● Dec. 24, 2025

But he demonstrated Wednesday that his leadership remains intact—and strong enough to prevent tension in the Fed’s dual mandate from devolving into deleterious tension within the committee.

From Barron's ● Dec. 12, 2025

“The results are always more significant if the patient and I are alone when the psychosubstantiation tests are performed. External distractions have a deleterious effect on the ramified scores.”

From "Flowers for Algernon" by Daniel Keyes


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