膕 [腘]

Jyutping gwok3
Pinyin guó

Definitions (Wiktionary)
  1. character
    knee pit; popliteal fossa
Definitions (Unihan)
  1. hollow
  2. Cangjie Input - Simplified
    BWMI
  3. Cangjie Input - Traditional
    BWIM

膕 [腘]

Jyutping
Pinyin guó

Definitions (CC-CEDICT)
  1. knee pit
  2. popliteal fossa (medicine)