polyphonism rare.
(ˈpɒlɪfəʊnɪz(ə)m)
[f. as polyphone + -ism.]
1. Multiplication of sound, as by an echo.
| 1713 Derham Phys.-Theol. iv. iii. 133 The magnifying the Sound by the Polyphonisms, or Repercussions of the Rocks, Caverns, and other phonocamptick Objects..in the Mount. |
2. Mus. The use of polyphony; polyphonic style or composition.
| 1864 Webster, Polyphonism..composition in parts; contrapuntal composition. |