電仁 [电－]

Jyutping din6 jan4
Pinyin diàn rén

Definitions (Wiktionary)
  1. noun, Min-Nan
    glass liner of a thermos flask
    (syn.) 瓶膽, 電瓶膽, 电罐仁, 电瓶胆, 電罐仁, 瓶胆