slow wave

noun

, Physiology.

1. delta wave.

Example Sentences

These are relatively slow waves that spark in the brain as you daydream, or in the middle of a great run, or in the shower with a totally relaxed mind.

From Singularity Hub 

Mrs. Walbridge looked at him, a slow wave of understanding creeping to her brain.

From Project Gutenberg

The soft rolling of thunder came from a long way off, like the boom of a slow wave on a distant beach.

From Project Gutenberg

There was no moon, but the stars burned steadily overhead, their reflections rising and falling with each slow wave.

From Project Gutenberg

Then a slow wave of red crept over his face and crimsoned his ears.

From Project Gutenberg

Keith's only answer was a slow wave of the arm in protest toward Norman to keep clear of the contest and leave it to him.

From Project Gutenberg