Pronunciation: (sem"ē-ô"tu-mat'ik, sem"ī-), [key]
1. partly automatic.
2. (of a firearm) automatically ejecting the cartridge case of a fired shot and loading the next cartridge from the magazine but requiring a squeeze of the trigger to fire each individual shot.
a self-loading rifle or other firearm.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.