純數 [纯数]

Jyutping seon4 sou3
Pinyin chún shù

Definitions (粵典–words.hk)
  1. 名詞
    相對​應用​數學​，​純數​係​以​研究​數學​本身​、​不為​現實​用途​為​目的​嘅​學​問​，​例如​數論
    pure mathematics
  2. 名詞
    2013​前​，​高考​嘅​其中​一科
    pure mathematics, as a subject in Hong Kong Advanced Level Examination before 2013
  3. 參看
    純粹數學
Definitions (Wiktionary)
  1. noun
    cardinal number (word that expresses a countable quantity)
    (syn.) 基数, 基數