CONCUSSION
concussion
(noun) any violent blow
concussion
(noun) injury to the brain caused by a blow; usually resulting in loss of consciousness
Source: WordNet® 3.1
Etymology
Noun
concussion (countable and uncountable, plural concussions)
A violent collision or shock.
(uncountable in Commonwealth, countable in North America) An injury to part of the body, most especially the brain, caused by a violent blow, followed by loss of function.
(legal, civil law) The unlawful forcing of another by threats of violence to yield up something of value.
Source: Wiktionary
Con*cus"sion, n. Etym: [L. concussio, fr. concutere, concussum, to
shake violenty; con- + quatere to shake. See Cashier, Quash.]
1. A shaking or agitation; a shock; caused by the collision of two
bodies.
It is believed that great ringing of bells, in populous cities, hath
dissipated pestilent air; which may be from the concussion of the
air. Bacon.
2. (Med.)
Definition: A condition of lowered functional activity, without visible
structural change, produced in an organ by a shock, as by fall or
blow; as, a concussion of the brain.
3. (Civil Law)
Definition: The unlawful forcing of another by threats of violence to yield
up something of value.
Then concussion, rapine, pilleries, Their catalogue of accusations
fill. Daniel.
Concussion fuse (Mil.), one that is ignited by the concussion of the
shell when it strikes.
Syn.
– See Shock.
Source: Webster’s Unabridged Dictionary 1913 Edition