Hydroxyquinol

Part of speech: noun

Definitions

1. A chemical compound with three hydroxyl groups on a benzene ring, used as a developing agent in photography and as a reducing agent
2. An organic compound of the benzenetriol family that acts as a reducing agent and was once used in photographic developing solutions
3. A crystalline aromatic chemical with three hydroxyl groups attached to a benzene ring, valued as a reducing agent and in photographic processing

Etymology: Hydroxyquinol is a chemical name built from parts that were each coined on purpose, and none of them is older than the nineteenth century. Its first half, "hydroxy-", combines "hydro-", from ancient Greek "hudōr" meaning water, with "oxy-", from "oxys" meaning sharp or acid, and the hydrogen-and-oxygen naming pattern came out of French chemistry, where "hydrogène" and "oxygène" were formed from Greek "-genes" meaning "producing." The word for the oxygen-containing group was therefore a deliberate construction, not a traditional term. The second half, "quinol", is a shortened form of "quinone" and "alcohol" combined, reflecting the chemical family the compound belongs to. The suffix "-ol" marks an alcohol, and the "-yl" sound that appears in "hydroxyl" comes from Greek "hylē," meaning wood or matter, which chemists adopted for radicals. Put together, the name tells a chemist exactly what the molecule contains: an aromatic ring of the quinone type carrying hydroxy groups on its structure.