Origin of commissure
Middle English, from Middle French or Latin; Middle French, from Latin commissura a joining, from commissus, past participle
First Known Use: 15th century
Medical Definition of commissure
1: a point or line of union or junction between two anatomical parts (as the lips at their angles or adjacent heart valves)
2: a connecting band of nerve tissue in the brain or spinal cord—see anterior commissure, corpus callosum, gray commissure, habenular commissure, hippocampal commissure, posterior commissure; compare massa intermedia
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