In arithmetic and mathematics, **cardinal numbers**, or **cardinals** for short, are a generalization of the natural numbers used to measure the cardinality or size of sets. The **cardinality** of a finite set is a natural number - the number of elements in the set.

0, 1, 2, 3, *n*...

In linguistics, **cardinal numbers** are number words representing a quantity (such as one, two, three, etc. in English). They are related to ordinal numbers (such as first, second, third, etc.)

See Also

**12.21 - Fibonacci Whole Numbers v Irrational Decimal near Equivalents**
**Arithmetic**
**atomic number**
**cardinal point**
**Figure 3.00 - Infinite Number of Atomoles or Alphanon filling all Space**
**Figure 3.9 - Cardinal Directions of Force and Energy Flows**
**Figure 4.1 - Triple Cardinal Directions Vectors or Dimensions**
**Indig Numbers**
**mass number**
**Interval**
**Number**
**Oxidation Number**
**proton number**
**quantum number**
**Sympsionics**
**wave number**