n.
Pronunciation: ' kä-m ə - ˌ shu ̇ r
Function: noun
Etymology: Middle English, from Middle French or Latin; Middle French, from Latin commissura a joining, from commissus, past participle
Date: 15th century
1 : a point or line of union or junction especially between two anatomical parts (as adjacent heart valves)
2 : a connecting band of nerve tissue in the brain or spinal cord
– com · mis · sur · al \ ˌ kä-m ə - ' shu ̇ r- ə l \ adjective