interme'diate range" ballis'tic mis'sile
any supersonic missile that has a range of 800 to 1500 nautical mi. (1500 to 2800 km) and follows a ballistic trajectory after a powered, guided launching. Abbr.: IRBM, I.R.B.M.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.