From _count_ (“to enumerate”) +‎ _-able_

Wikipedia Wikipedia COUNTABLE (_not comparable_) * Capable of being counted; having a quantity. * (mathematics, of a set) Countably infinite; having a bijection with the natural numbers. * (mathematics, of a set) Countably infinite or finite; having a bijection with a subset of the natural numbers. * (grammar, of a noun) Freely usable with the indefinite article and with numbers, and therefore having a plural form. SYNONYMS * (having a bijection with a subset of the natural numbers): denumerable ANTONYMS * uncountable HYPONYMS * (having a bijection with a subset of the natural numbers): finite, countably infinite HYPERNYMS * (countably infinite): infinite DERIVED TERMS * countable set * countable additivity RELATED TERMS * countability TRANSLATIONS

* mass noun * plurale tantum