1.
[syn: left hemisphere, left brain]
The Collaborative International Dictionary of English v.0.48:
left brain \left" brain`\, n.
The left cerebral hemisphere of the brain; in humans, it
controls motor activity on the right side of the body, and in
most people is the primary location for control of language,
logic, and mathematical thought.
[PJC]
WordNet (r) 3.0 (2006):
left brain
n 1: the cerebral hemisphere to the left of the corpus callosum
that controls the right half of the body [syn: left
hemisphere, left brain]