Meaning & use
Protagon
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A historical term for a waxy, fatty substance once thought to be a distinct component of nerve and brain tissue.
See it in a sentence
Nineteenth-century chemists described protagon as a key constituent of brain matter.
Later research showed that what was called protagon was actually a mixture of several different lipids.
A note on using this word
First described by chemist Ludwig Liebreich in 1865; the term is now obsolete, as protagon was later shown to be a mixture of separate lipid compounds rather than a single substance.
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