An asymmetry of function of the two cerebral hemispheres. In most right-handers, the left hemisphere is specialized for language functions, while the right hemisphere is better at various visual and spatial tasks.

The dominance of one cerebral hemisphere over the other vis-a-vis a certain function.

the phenomenon in which the two hemispheres of the brain specialize in regard to different functions.

the quality of having distinct sides, the preference of one side to the other

The perception by an individual that a sound is being heard on one side due to a timing and intensity difference, when in fact the sound was presented bilaterally.