Definition of tartaric acid in US English:

tartaric acid

noun

Chemistry
  • A crystalline organic acid which is present especially in unripe grapes and is used in baking powders and as a food additive.

    A dibasic acid; chemical formula: COOH(CHOH)₂COOH

    • ‘Many carboxylic acids are present in the foods and drinks we ingest, like malic acid (found in apples), tartaric acid (grape juice), and oxalic acid (spinach and some parts of the rhubarb plant).’
    • ‘The calcium tartrate is neutralized by the addition of sulfuric acid to produce calcium sulfate and tartaric acid.’
    • ‘Citric acid and tartaric acid can also be purchased locally from home wine making shops and some chemists.’
    • ‘The mixture of fruit acids may include citric acid, glycollic acid, lactic acid, malic acid and tartaric acid.’
    • ‘Place the sugar, citric acid and tartaric acid in a large bowl (non-metallic is probably best).’

Origin

Late 18th century: tartaric from obsolete French tartarique, from medieval Latin tartarum (see tartar).

Pronunciation

tartaric acid

/tɑrˌtɛrɪk ˈæsəd/