Cubic Inches or the Volume. The Bigger the CI the more air its holds.
There is no chemical symbol CI. If you meant Cl then it is Chlorine.
CC stand's for "Cubic Centimeters". There are 16.387 CC's in a CI (cubic inch)
CI4 * carbon (IV) iodide * carbon iodide * carbon tetraiodide * tetraiodomethane
At Ci Ci's Pizza.