To print all the places that contain an executable name you are looking for, use "type -a", you will bring out the alias and the path of the icc. In this case, there is no aliase so the alias did not surface up in the command line
$ type -a icc icc is /opt/intel/composerxe-2011.2.137/bin/intel64/iccTo check the type of file the executable is categorised ie alias, keyword, function, builtin, file,you can use the command
$ type -t icc file
For more usage of type, see the man page.