anthocyanins

listen to the pronunciation of anthocyanins
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plural of anthocyanin
A type of water-soluble pigment having a red, purple, or blue colour depending on the plant cell pH
The pigments that provide the red colors in grapes and wine
Violet, red, and blue coloring matter of many fruits, flowers, and leaves Depolarizers in electrochemical reactions; as such they cause trouble in canned foods by accelerating internal can corrosion
pigments in plants responsible for pink and purple colors
Pigmented forms of tannins contained in the skin of red grapes Natural colouring agents of all red wines