Which of the following describes a cubic number?

A cubic number is defined as a number that is raised to the third power, which means it is multiplied by itself twice. For example, (2^3) (2 cubed) equals (2 \times 2 \times 2 = 8). This operation essentially involves taking a number and multiplying it by itself two additional times, which is precisely what option B describes. Understanding cubic numbers is crucial because they appear in various areas of mathematics, including geometry when calculating volumes, as well as algebraic expressions.

The distinction here is clear: raising a number to the third power is the definitive action that constitutes a cubic number. Other options pertain to different mathematical operations and concepts, which do not accurately reflect the nature of cubic numbers.