Viosinho is a white Portuguese wine grape variety that is grown primarily in northern Portugal where it attains high acidity levels.
It is primarily found in the Trás-os-Montes and Douro DOCs.
[1] It is used primarily as a blending grape where it adds structures and flavor to both still and fortified Port wines.
[2] This wine grape–related article is a stub.
You can help Wikipedia by expanding it.