- vitamin
- 1920, originally vitamine (1912) coined by Pol. biochemist Casimir Funk (1884-1967), from L. vita "life" (see vital) + amine, because they were thought to contain amino acids. The terminal -e formally was stripped off when scientists learned the true nature of the substance; -in was acceptable because it was used for neutral substances of undefined composition. The lettering system of nomenclature (Vitamin A, B, C, etc.) was introduced at the same time.