Unlike Wagner, Sibelius 'polytonalism was subtler, less expressive, but more intuitive.    From Wordnik.com.  [VeryCD - 电驴资源订阅] Reference

Serialism, atonalism, 12-tonalism, spectralism, minimalism, polytonalism, microtonalism, whole tonalism, tritones, open fifths, symphonies, sonatas, and music concrete.    From Wordnik.com.  [Flos Carmeli] Reference

From the post-Romantic eclecticism of Howard Hanson and the post-Romantic expressionism of Bernard Rogers through the neoclassicized impressionism of Edward Burlingame Hill and John Alden Carpenter, the strictly Parisian neo-Classicism of Walter Piston, the romanticized neo-Classicism of Roy Harris and William Schuman, the elegant neo-Romanticism of Samuel Barber, the sentimental neo-Romanticism of David Diamond, the folksy neo-Romanticism of Douglas Moore, Randall Thompson, and Henry Cowell, the Germano-eclectic modernism of Roger Sessions, the neo-primitive polytonalism of Charles Ives, and the ecstatic chromaticism of Carl Ruggles, to the percussive and rhythmic research fellows Edgard Varese and John Cage, we have everything.    From Wordnik.com.  [Whatever Happened to "Classical" Music? Part II] Reference