Countable (adjective)

1. Able to be counted or expressed in numbers; capable of being enumerated.
2. Capable of being counted as one in a series of things.

Origin:

Late middle english: from old french comptable, from late latin computabilis, from computare "calculate".

Examples:

1. Countable nouns are objects that can be counted.
2. The number of employees is a countable quantity.
3. This set contains a countable number of elements.
4. The coins in the jar are countable pieces of money.
5. The number of countries in the world is a countable quantity.