commissure

(kom′ĭ-shur″ )

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[ commissura, connection, band, knot]

1. In the central nervous system, an axon tract that crosses the midline (sagittal) plane between two homologous and symmetric structures, e.g., the corpus callosum, which interconnects the right and left cerebral cortices.
2. The meeting of two structures, as the lips, eyelids, or labia, across the midline (sagittal) plane.
commissural (kom″ĭ-shur′ăl )

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, adj.

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