diatonic scale - a scale with eight notes in an octave; all but two are separated by whole tones

church mode, ecclesiastical mode, Gregorian mode, medieval mode - any of a system of modes used in Gregorian chants up until 1600; derived historically from the Greek mode

Greek mode - any of the descending diatonic scales in the music of classical Greece

major diatonic scale, major scale - a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th

minor diatonic scale, minor scale - a diatonic scale with notes separated by whole tones except for the 2nd and 3rd and 5th and 6th