commissure

/ˈkɑmɪʃʊr/
noun
  1. A band of nerve fibers connecting the two hemispheres of the brain.
    • A commissure allows the left and right sides of the brain to share information.
    • Scientists study commissures to understand how the brain coordinates movement.
    • The corpus callosum is the largest commissure in the human brain.
  2. A place where two things join or meet, such as the line where the lips meet or the edges of a wound.
    • The commissure of the lips is the corner where the upper and lower lips meet.
    • The commissure between the two petals was barely visible.
    • After surgery, the doctor checked the commissure of the incision for proper healing.
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