From Longman Dictionary of Contemporary Englishsteel guitarˌsteel guiˈtar (also pedal steel guitar) noun [countable] APMa musical instrument with ten strings that is played using a steel bar and a pedal (=a bar you press with your foot)
Examples from the Corpus
steel guitar• They should get themselves a steel guitar.• Herron rounded out the band with some fiddle and steel guitar.• He was a fabulous steel guitar player, just fabulous, as good as anybody can be.• Cook, who tears up the steel guitar and trombone. 