What is the meaning of Polytonic?

Having several tones.

  1. Of or using the Greek system of diacritics which employs the rough and smooth breathings and the grave, acute, and circumflex accents. Replaced by the monotonic system in 1982.

Of or using the Greek system of diacritics which employs the rough and smooth breathings and the grave, acute, and circumflex accents. Replaced by the monotonic system in 1982.

Source: wiktionary.org