Cc

cC commonly denotes the cubic centimeter, a unit of volume defined as the volume of a cube 1 centimeter on each edge. In practice, 1 cubic centimeter equals 1 milliliter, and therefore 1000 cubic centimeters equal 1 liter. While widely used in medicine, pharmacology, and automotive contexts, the cubic centimeter is not an official SI unit; the SI unit of volume is the liter, with the milliliter as a practical subunit.

In everyday use, the term appears in dosing, syringe measurements, and intravenous fluid volumes in medical settings. In automotive and mechanical contexts, engine displacement is frequently expressed in cubic centimeters, such as a 1,500 cc engine. For conversion, note that 1 cc = 1 mL, and 1000 cc = 1 L.

The notation is not strictly standardized. The common abbreviation is “cc” in lowercase, while “cC” is a nonstandard typographic variant that may appear in older texts or certain publications. Most modern technical writing and consumer labeling prefer “cc” or “mL” to avoid confusion with other symbols. In summary, cC refers to cubic centimeters, a convenient, non-SI unit of volume equal to milliliters, widely used in medical dosing and engine displacement, with conventional notation favoring cc or mL.