— concussional, concussant /keuhn kus"euhnt/ , adj. — concussive , adj.
/keuhn kush"euhn/ , n.
1. Pathol. injury to the brain or spinal cord due to jarring from a blow, fall, or the like.
2. shock caused by the impact of a collision, blow, etc.
3. the act of violently shaking or jarring.
[ 1350-1400; ME concussion- (s. of concussio ) a shaking. See CONCUSS, -ION ]