资料来源 : Webster's Revised Unabridged Dictionary (1913)

Nuclein \Nu"cle*in\, n. (Physiol. Chem.)
   A constituent of the nuclei of all cells. It is a colorless
   amorphous substance, readily soluble in alkaline fluids and
   especially characterized by its comparatively large content
   of phosphorus. It also contains nitrogen and sulphur.