|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a scrap or morsel of food left at a meal.|
concussion con·cus·sion (kən-kŭsh'ən)
A violent shaking or jarring.
An injury to a soft structure, especially the brain, produced by a violent blow and followed by a temporary or prolonged loss of function.
|concussion (kən-kŭsh'ən) Pronunciation Key
An injury to a soft structure, especially the brain, produced by a violent blow or impact and followed by a temporary, sometimes prolonged, loss of function. A concussion of the brain results in transient loss of consciousness or memory.