tartness
nounUK /ˈtɑːtnəs/
US /ˈtɑːrtnəs/
Tartness is the sour taste of something like a lemon.
The tartness of the green apple made my mouth pucker.
OTHER MEANINGS
2. A sharp or bitter quality in someone's words or manner.
There was a hint of tartness in her reply.
3. The quality of being sharply clever or critical.
The critic's tartness made the review fun to read.
4. A slightly sour flavor in wine or fruit.
The wine had a pleasant tartness that balanced its sweetness.