the left hemisphere of the human brain, which is believed to control linear and analytical thinking, decision-making, and language (as modifier): a left-brain activity
WordReference Random House Unabridged Dictionary of American English © 2025
left′ brain′,
- Anatomythe cerebral hemisphere on the left side of the corpus callosum, controlling activity on the right side of the body: in humans, usually showing some degree of specialization for language and calculation. Cf. right brain.
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