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

booster \boost"er\ b=oost"~er, n.
   1. elec. an instrument for regulating the electro-motive
      force in an alternating-current circuit; -- so called
      because used to "boost", or raise, the pressure in the
      circuit.
      webster 1913 suppl.

   2. an enthusiastic supporter.
      pjc

   3. the first stage of a multistage rocket, providing all or
      part of the driving force at lift-off and until the second
      stage ignites, whether or not the booster stage is
      detached after the fuel is spent. also called booster
      rocket. in some cases, a booster has been used to assist
      the takeoff of airplanes.
      pjc

   4. med. an immunizing medication given after an initial
      immunizing treatment, to provide increased or extended
      immunity. also called booster dose. when in the form of
      an injection, it may be called a booster shot.
      pjc

   5. any auxiliary device or part of a device to provide
      increased power, force, or effectiveness, as with a
      pumping device.
      pjc

   6. mil. an explosive charge which is more powerful than a
      primer, used in conjunction with a primer to assure
      detonation of the main charge. integrated blasting caps
      containing separate compartments for primer and booster
      are used as detonators for certain explosives.
      pjc
see also:
booster rocket booster dose booster shot 

[2] : WordNet (r) 2.0

booster shot
     n : an additional dose that makes sure the first dose was
         effective syn: booster, booster dose, recall dose
see also:
booster booster dose recall dose 

Booster Shot >> B Words
Booster Shot, definition of term: Booster Shot
booster+shot_pag1.html

Booster >> B Words
Booster, definition of term: Booster
booster_pag1.html

Shot >> S Words
Shot, definition of term: Shot
shot_pag1.html

Shot Glass >> S Words
Shot Glass, definition of term: Shot Glass
shot+glass_pag1.html

Mug Shot >> M Words
Mug Shot, definition of term: Mug Shot
mug+shot_pag1.html

Passing Shot >> P Words
Passing Shot, definition of term: Passing Shot
passing+shot_pag1.html

Pot Shot >> P Words
Pot Shot, definition of term: Pot Shot
pot+shot_pag1.html

Long Shot >> L Words
Long Shot, definition of term: Long Shot
long+shot_pag1.html

Hook Shot >> H Words
Hook Shot, definition of term: Hook Shot
hook+shot_pag1.html

Crack Shot >> C Words
Crack Shot, definition of term: Crack Shot
crack+shot_pag1.html

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