HQI stands for hydrargyrum medium-arc iodide. It is still used in homeopathy under the Latin name "Hydrargyrum bicyanatum". Two examples of the arcane words Wolfe uses are "Ascian" and "Hydrargyrum". However, they do also manufacture HMI (Hydrargyrum Medium-arc Iodide) day-light lighting units. It is commonly known as quicksilver and was formerly named hydrargyrum ( ). "Hydrargyrum" comes from the Greek name for the element mercury.