Semiautomatic Partly Automatically Adjective Firearm Pressure Shot Noun

semi·au·to·mat·ic
\\-ˌȯ-tə-ˈma-tik\\ adjective: not fully automatic: as
  a. operated partly automatically and partly by hand
  b. of a firearm : able to fire repeatedly but requiring release and another pressure of the trigger for each successive shot
• semiautomatic noun
• semi·au·to·mat·i·cal·ly \\-ti-k(ə-)lē\\ adverb

semi-automatic
  in ref. to firearms, 1911, from semi- + automatic (q.v.).

semi-automatic
7semi-auto'mat·ic adjective   (of a gun 枪) able to load bullets automatically, and therefore very quickly, but not firing automatically
   半自动的
• 7semi-auto'mat·ic noun

semi·automatic
I. \“+\ adjective
Etymology: semi- + automatic
: not fully automatic: as
 a. : operated partly automatically and partly by hand
  < a lathe that operates automatically after insertion of the rough piece by the operator is semiautomatic >
 b. of a firearm : that employs gas pressure or force of recoil and mechanical spring action in ejecting the empty cartridge case after the first shot and in loading the next cartridge from the magazine but that requires release and another pressure of the trigger for firing each successive shot — compare 5
• semi·automatically \“+\ adverb
II. noun

: a semiautomatic device or machine; especially : a semiautomatic firearm