tartness tartness /ˈtɑːrtnəs/

noun

1. A rough and bitter manner  ( acerbity , acrimony , jaundice , bitterness , tartness , thorniness )
   a rough and bitter manner
   
2. A sharp sour taste  ( acerbity , tartness )
   a sharp sour taste
   
3. The taste experience when vinegar or lemon juice is taken into the mouth  ( sour , sourness , tartness )
   the taste experience when vinegar or lemon juice is taken into the mouth