Cc/ccs - Do They Mean the Same Thing?

I have not seen ccs written, but since a cc is 1 cubic centimeter, the additon of an s, as in ccs, probably means multiple cc's. This is also the same thing as ml or millimeter. The metric system is very practical. A cc of water at a certain temperature weighs 1 gram. a thousand cc's is 1 liter.

cc is the singular form and cc's are just the multiple form of the term "cc". cc is also the same as ml (mililiter).

It may be an abbreviation for CCs to measure volume-I sometimes refer to either one.  If you need clarification, I would ask your PS at consultation.