Nuclein
Pronunciation : Nu"cle*in
Part of Speech : n.
Definition : Defn: 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.
(Physiol. Chem.)
Source : Webster's Unabridged Dictionary, 1913