n.
Pronunciation: ˌ h ī -dr ō -kwi- ' n ō n, - ' kwi- ˌ n ō n
Function: noun
Etymology: International Scientific Vocabulary
Date: circa 1872
: a white crystalline strongly reducing phenol C 6 H 6 O 2 used especially as a photographic developer, as an antioxidant and stabilizer, and in medicine to remove pigmentation from hyperpigmented areas of skin