英语释义
1. a point or line of union or junction especially between two anatomical parts (such as adjacent heart valves)
2. a connecting band of nerve tissue in the brain or spinal cord
3. a point or line of union or junction between two anatomical parts (as the lips at their angles or adjacent heart valves)
4. 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