terra incognita

The old maps of the body had the equivalent of major roads and significant geography but also areas cartographers labelled unknown or “terra incognita”.

This is really quite intriguing as we do not know much about these parts of the genome; our work shows there is benefit in exploring further this genetic terra incognita.'

Let them believe that the Puget Sound region is terra incognita and perhaps they won’t come out here.

On the map, the far northwest corner was labeled “terra incognita” with borders trailing off into an indistinct mist and sea monsters lurking in the curling waves.

For many years, the human Y chromosome was terra incognita.