無窮小 [无穷－]

Jyutping mou4 kung4 siu2
Pinyin wú qióng xiǎo

Definitions (CC-CEDICT)
  1. infinitesimal (in calculus)
  2. infinitely small
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）