We found one dictionary that defines the word union of countable sets:

Science (1 matching dictionary)

1. union of countable sets: PlanetMath Encyclopedia

▸ Words similar to union of countable sets ▸ Usage examples for union of countable sets ▸ Idioms related to union of countable sets ▸ Wikipedia articles (New!) ▸ Words that often appear near union of countable sets ▸ Rhymes of union of countable sets ▸ Invented words related to union of countable sets