Meaning of the word "gray matter" in English

What does "gray matter" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

gray matter

US /ˈɡreɪ ˌmætər/
UK /ˈɡreɪ ˌmætər/
"gray matter" picture

Noun

1.

the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites

Example:
Damage to the gray matter can impair cognitive functions.
Scientists are studying how exercise affects the development of gray matter in children.
2.

intelligence; intellect

Example:
You'll need to use your gray matter to solve this puzzle.
It takes a lot of gray matter to become a successful scientist.
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