grey matter

noun

1. Technical name: substantia grisea. the greyish tissue of the brain and spinal cord, containing nerve cell bodies, dendrites, and bare (unmyelinated) axons Compare white matter

2. informal,  brains or intellect

Example Sentences

The 32-year-old's abilities, grey matter as much as fast twitch, will age slowly and well.

From BBC

In the grey matter and guts alike, the rationale felt right.

From BBC

These changes in brain chemistry might lead to changes in the brain grey matter volume, as observed in this study.

From Science Daily

The seven-hour procedure took longer than planned, Ms Jennings said, because the grey matter in Rachel's brain was larger than anticipated.

From BBC

For example, the superior colliculus is relatively large in fish and birds whereas it is just a tiny pea tucked away in grey matter in humans.

From Science Daily