Acetic acid that contains a very low amount of water (less than 1%) is called anhydrous (water-free) acetic acid or glacial acetic acid. The reason it's called Glacial is because it solidifies into solid acetic acid crystals just cooler than room temperature at 16.7 °C.
Acetic Acid is an organic compound with the chemical formula CH3COOH. which when diluted is also called Glacial Acetic Acid. In households, diluted acetic Acid is often used in descaling agents. In the food industry, acetic Acid is used under the food.