1. adjective /vəˈraɪətəl/
a) Pertaining to a distinct variety of organism.
b) Made from a single specific variety (especially of grapes in wine).
2. noun /vəˈraɪətəl/
a) A wine made primarily from or exclusively from a single variety of grape, which carries the name of that grape.
The varietal Merlot has rich red color and a robust fruity taste. Cabernet Sauvignon is a varietal that descended from Cabernet Franc and Sauvignon Blanc.
b) By extension, a coffee made primarily from or exclusively from a single variety of coffee bean.
Wikipedia foundation.