Sentence:  For example , the importance of the Regulus 2 , , a very promising aerodynamic ship to surface <WSD>missile</WSD> designed to be launched by surfaced submarines , was greatly diminished by the successful acceleration of the much more advanced Polaris ballistic missile launched by submerged submarines . 
Meaning of the word marked with <WSD> tags:  a rocket carrying a warhead of conventional or nuclear explosives; may be ballistic or directed by remote control