[1] : The Collaborative International Dictionary of English v.0.48

whiplash injury \whip"lash` in"jury\, n.
   an injury to the neck caused by the sudden motion of the head
   backward and forward, as occurs to the occupants of a vehicle
   hit from behind by another vehicle.
   pjc

[2] : WordNet (r) 2.0

whiplash injury
     n : an injury to the neck the cervical vertebrae resulting
         from rapid acceleration or deceleration as in an
         automobile accident syn: whiplash
see also:
whiplash 

Whiplash Injury >> W Words
Whiplash Injury, definition of term: Whiplash Injury
whiplash+injury_pag1.html

Whiplash >> W Words
Whiplash, definition of term: Whiplash
whiplash_pag1.html

Injury >> I Words
Injury, definition of term: Injury
injury_pag1.html