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Definition of Nuclein
1. n. 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.
Definition of Nuclein
1. a protein found in nuclei [n -S]
Medical Definition of Nuclein
1. The term used by Friedrich Miescher to describe the nuclear material he discovered in 1869, which today is known as DNA. (09 Oct 1997)