diatonicism

[ dahy-uh-ton-uh-siz-uh m ]
/ ˌdaɪ əˈtɒn əˌsɪz əm /

noun

the use of diatonic harmony; composition in a diatonic idiom.

Origin of diatonicism

First recorded in 1930–35; diatonic + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019