 On this understanding, the diminished seventh chord built on the leading note is accepted as diatonic in minor keys.If the strictest understanding of the term "diatonic scale" is adhered to - whereby only transposed 'white note scales' are considered diatonic - even a major triad on the dominant scale degree in C minor (G–B–D) would be chromatic or altered in C minor.Some writers use the phrase "diatonic to" as a synonym for "belonging to".