## Etymology
A 20th-century coinage blending vitamin (from Latin vita 'life' + amine) with the suffix -mer (as in isomer, from Greek meros 'part'), denoting a chemical form sharing a vitamin's activity.

## AI Etymology
Vitamer is a 20th-century coinage blending vitamin (from Latin vita 'life' + amine) with the suffix -mer (as in isomer, from Greek meros 'part'), denoting a chemical form sharing a vitamin's activity. In current use it is a noun meaning "any of several related compounds that share a single vitamin's activity". That sense is explained by the older material without requiring a speculative semantic step: the inherited or borrowed base supplies the field of meaning, while the English formation fixes its modern role. The surface form is compositional: its joined elements remain visible in the modern word. The historical chain includes Latin vita and Ancient Greek meros. Related English forms include vitamin and vita. The word's history is thus visible in its construction: the components remain interpretable even after the whole expression has settled into a conventional English meaning.

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- Numbers & Quantity
- Word Formation & Derivatives

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