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Date: 2012-02-01 07:02 pm (UTC)
From: [identity profile] errolwi.livejournal.com
Well, they say bullet, you might say tiny, tiny missle.
Well, we don't call a guided artillery shell or mortar bomb a 'guided missile', so probably not. It's even debatable if a ICBM is a 'guided missile'.

Date: 2012-02-01 08:47 pm (UTC)
From: [identity profile] errolwi.livejournal.com
This is a common source of confusion.
A missile in this sense (as opposed to a generic missile, anything moving through the air e.g. includes arrows, thrown rocks, bullets) is a shortened version of 'guided missile'. A guided missile is normally defined as being guided and powered - being launched by an external source doesn't count. A 'rocket' (e.g. FROG Free Rocket Over Ground, WW2 aircraft-luanched rockets) is powered, normally stabilised (e.g fixed fins) but not guided - it will go where it is pointed at launch, subject to wind, gravity etc.
If you put a laser homer and guidance fins on an aircraft bomb, then you have a guided bomb (most laser and/or GPS guided bombs are kits added to standard bombs). If you put a laser homer (or GPS) and steerable fins on an artillery shell we don't call it a missile (see Copperhead). Booster and laser/GPS on an artillery shell probably meets some technical definitions, but I don't think they are refered to as missiles (see 'Extended Range Guided Munition').
Adding guidance to something pushed out of a tube by an explosion (even if the explosion is of explosives loaded into one end of the tube at the same time as what comes out of the tube) wouldn't normally cause it to be called a guided missile.

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