LaneLier's Index - a calculated number used to predict whether or not a water will precipitate, be in equilibrium with, or dissolved calcium carbonate. It is sometimes erroneously assumed that any water which tend to dissolves calcium carbonate is automatically corrosive.
Lime - the common name for calcium oxide.
Lime Scale - hard water scale containing a high percentage of calcium carbonate.
Limestone - a sedimentary rock, largely calcium carbonate, usually also containing significant amounts of magnesium carbonate.
Liter - the basic metric unit of volume; 3,785 liters equals 1 U.S. gallon; 1 liter of water weighs 1000 grams.