Water lime is a term used to describe a substance commonly known as calcium hydroxide or hydrated lime. Hydrated lime is a white powder obtained when calcium oxide (quicklime) reacts with water. Synonyms for water lime include slaked lime, pickling lime, and milk of lime. Slaked lime is the most commonly used synonym and refers to the process of combining quicklime with water to create a calcium hydroxide solution. Pickling lime is another synonym, often used in food preparation for pickling vegetables. Milk of lime refers to a suspension of calcium hydroxide particles in water, often used in construction and environmental applications.