The word 'vitamin' was coined in 1912 by Polish biochemist Casimir Funk. He combined the Latin root 'vit-' (from 'vita', meaning 'life') with the chemical term 'amine', because the first identified substance of this class, thiamine, was thought to be an amine, a type of nitrogenous compound essential for life. Although later discoveries showed not all vitamins are amines, the name was retained due to its established usage. Thus, the term's literal construction as "life-amine" elegantly captures the original scientific hypothesis about these crucial, life-sustaining nutrients.

Structure: vit (life) + amin (chemical suffix) vit from Latin 'vita' (life); amin from 'amine', a chemical compound containing nitrogen, from 'ammonia'.