ethnicness means the quality of being ethnic.
Etymology
From ethnic + -ness.
noun
- The quality of being ethnic.“Today the tendency is to go to the other extreme and to insist that minority groups maintain their separate identity. There seems to be no good reason why ethnics who wish to remain segregated should not be permitted that choice, but those who wish to lose their “ethnicness” and become full-fledged American citizens should be encouraged rather than blocked in doing so.”