denumerable

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Capable of being assigned a bijection to the natural numbers. Applied to sets which are not finite, but have a one-to-one mapping to the natural numbers. not-comparable
    — The empty set is not denumerable because it is finite; the rational numbers are, surprisingly, denumerable because every possible fraction can be assigned a natural number and vice versa.

词源

The word was introduced around the beginning of the 20th century, from Latin denumerō (“to count out”) + -able.
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