Webster's English Dictionary

semiautomatic

semi.au.to.mat.ic \-.o.t-*-'mat-ik\ \-i-k(*-)le-\ aj : not fully automatic 
   : as  : operated partly automatically and partly by hand  of a firearm  : 
   employing gas pressure or force of recoil and mechanical spring action  to 
   eject the empty cartridge case after the first shot and load the next 
   cartridge from the magazine but requiring release and another pressure of 
   the trigger for each successive shot - semiautomatic n