diatonismMus.|daɪˈætənɪz(ə)m| [f. diatonic a.: see -ism.] =prec. 1927Music & Lett. July 325 An insipid diatonic scheme which lacks the primitive freshness of Beethoven's diatonism.1928G. Cooke Theory of Music 19 Recent attacks upon conventional and arbitrary Diatonism.