Final answer:
Cubic centimeter and millimeter are units that belong to the metric system of measurement, which is distinct from the Imperial or customary system predominantly used in the United States.
Step-by-step explanation:
The words cubic centimeter and millimeter belong to the metric system of measurement. This system is primarily used in scientific contexts and in most countries outside of the United States. It includes units such as meters for length, liters for capacity, and grams for mass. In contrast, the customary system, also known as the Imperial System, includes units like inches, feet, and pounds, and is commonly used in the United States. The metric system is characterized by its ease of conversion, such as one cubic centimeter being equal to one milliliter, illustrating that different units within the system are straightforwardly related to each other.