US gills
A US gill is a unit of volume in the United States used for measuring liquids. One US gill is 1/4 of a US pint or 118.294 milliliters.
Cubic Centimeters
A cubic centimeter (cm³) is the volume of a cube 1 centimeter on each side, and is the same as a milliliter. Engine sizes are quoted in it, so a 1,600cc engine is 1.6 liters.