Noun
Sourness of taste, with bitterness and astringency, like that of unripe fruit.
Harshness, bitterness, or severity; as, acerbity of temper, of language, of pain.
Source: Webster's dictionaryEPIGRAM, n. A short, sharp saying in prose or verse, frequently characterize by acidity or acerbity and sometimes by wisdom. Ambrose Bierce