delta wave

American  

noun

Physiology.

1. any of the slow brain waves constituting delta rhythm.

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Etymology

Origin of delta wave

First recorded in 1935–40

Example Sentences

No sooner had Heerema McKenney and other researchers around the world begun pooling data and discussing how to react, the delta wave receded, and when omicron arrived, the cases simply disappeared.

From Washington Post

In the real world, people wear masks more often when cases are surging, said the institute’s Ali Mokdad, and 2021’s delta wave without vaccines would have prompted a major policy response.

From Seattle Times

One wouldn’t know that looking at state data, which shows the delta wave peak exceeding the peak of the current surge.

From Seattle Times

European regulators are considering expanding Novavax shots to teenagers based on a U.S. study of those as young as 12 during last summer’s delta wave.

From Seattle Times

The delta wave of the coronavirus caused a lull that dropped monthly income from around $40,000 to less than $10,000.

From Washington Post