DNA actually stands for "DeOxyRibo Nucleic Acid", which is an actual chemical name.

It was originally called "Nuclein" because the chemical structure was unknown. All that was known was that, whatever it was, it was contained within the nucleus of white blood cells. Therefore, it was named, "nuclein" by Friedrich Miescher in circa 1869-1871.

he added some simple demicalj to the missrocope cells islated awinite percipitate.

DNA was first isolated by the Swiss physician Friedrich Miescher who, in 1869, discovered a microscopic substance in the pus of discarded surgical bandages. As it resided in the nuclei of cells, he called it "nuclein"

Frederick Miescher was responsible for discovery nuclein (later known as DNA) so bascially he started the search for what DNA was which led to discovering hereditary information and the secrets of life. So yes, a pretty important discovery!

A German Chemist, Friedrich Miescher, discovered DNA in 1869, only four years after Mendel's work was published. Miescher extracted a white substance from the nuclei of human cells and fish sperm. he called this substance "nuclein" because it seemed to be specifically associated with the nucleus.