reduced mass

American  

noun

Mechanics.

1. a quantity obtained when one particle is moving about another, larger particle that is also moving, equivalent to the mass of the smaller particle, were the larger particle not moving, and equal to the quotient of the product of the two masses divided by their sum.

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Etymology

Origin of reduced mass

First recorded in 1930–35

Example Sentences

“Digital assets remained under pressure as investors reduced risk exposure amid rising geopolitical tensions, persistent exchange-traded fund outflows and a stronger focus on macroeconomic risks,” Saxo Bank analysts say in a note.

From The Wall Street Journal • Jun. 5, 2026

Notably, studies have shown that paid paternity leave is associated with a reduced risk of maternal postpartum health complications and an increased rate of infants receiving their necessary vaccines on time.

From Salon • May 17, 2026

Though research is mixed, one highly referenced study from 1998 suggests that that men who donate blood just once a year have an 88 percent reduced risk for heart attack compared to non–blood donors.

From Slate • May 9, 2026

In tests on tens of thousands of people, the jabs - alongside existing heart medicines - were linked to a 20% reduced risk of heart attacks and strokes.

From BBC • Mar. 31, 2026

Participants who completed five to six weeks of sessions, along with follow up booster sessions one to three years later, showed a reduced risk of dementia, including Alzheimer's disease, up to 20 years later.

From Science Daily • Feb. 11, 2026