lec·i·thin /ˈlɛsəθən/
  蛋黃素,卵磷脂
  lec·i·thin /ˈlɛsəθən/ 名詞
  卵磷脂,磷脂膽鹼
  Lec·i·thin n.  Physiol. Chem. A complex, nitrogenous phosphorized substance widely distributed through the animal body, and especially conspicuous in the brain and nerve tissue, in yolk of eggs, and in the white blood corpuscles.
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  lecithin
       n : a yellow phospholipid essential for the metabolism of fats;
           found in egg yolk and in many plant and animal cells;
           used commercially as an emulsifier