Debussysm

The "Société Nationale" and the "S.M.I." shared the honour of introducing to their members a number of important novelties, and the inevitable abundance of amateur efforts and students' exercises among them cannot make us disregard the presence of some works of real value and, above all, the tradition of continuous renovation of French music which manifests itself, if not by the introduction of a new language as at the appearance of Debussysm, at any rate by a constant flow of fresh ideas.

1915, René Chalupt, “Paris Letter”, in The Chesterian, page 279

Actually, the so-called present "Debussysm" is only a phase of the eternal process between the consonance and dissonance. Therefore, one who would consider intervals of a fourth or sixth as consonant intervals, or who would introduce the interval of a third in a final chord, is already in his own way "doing Debussysm."

1953, Victor Seroff, Maurice Ravel, page 117