資料來源 : Webster's Revised Unabridged Dictionary (1913)

Leuco- \Leu"co-\ (l[=u]"k[-o]-), Leuc- \Leuc-\ (l[=u]k-). [Gr.
   leyko`s white.]
   A combining form signifying white, colorless; specif.
   (Chem.), denoting an extensive series of colorless organic
   compounds, obtained by reduction from certain other colored
   compounds; as, leucaniline, leucaurin, etc.