Pungency

• Crab apple's quality
• A sharp sour taste
• Sourball quality
• Feature of Granny Smiths
• Vinegary quality
• Feature of Granny Smith apples
• The taste experience when vinegar or lemon juice is taken into the mouth

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Tartness \Tart"ness\, n. The quality or state of being tart. Syn: Acrimony; sourness; keenness; poignancy; severity; asperity; acerbity; harshness. See Acrimony .

Wiktionary Word definitions in Wiktionary
n. The characteristic of being tart; sharpness of taste; sourness; bitterness.