The term “Tannic” describes a wine that is very young and is not ready to be consumed. The tannic characteristic of wine is caused by a compound called tannin, which is a type of naturally occurring micronutrient called polyphenol; its concentration is what makes wine tannic. A perfectly tannic wine is firm and long lasting, and you can identify tannin in a wine by expereincing the drying sensation that occurs in your mouth when you consume it.
Provided by: Wine Frog