naphthol
(noun) either of two phenols derived from naphthalene
Source: WordNet® 3.1
naphthol (countable and uncountable, plural naphthols)
(organic compound) Either of two isomeric phenols derived from naphthalene; they are used in the preparation of dyes and many other compounds
Source: Wiktionary
Naph"thol, n. Etym: [Naphthalene + -ol.] (Chem.)
Definition: Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.
Source: Webster’s Unabridged Dictionary 1913 Edition
6 July 2024
(noun) absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death
The world’s most expensive coffee costs more than US$700 per kilogram. Asian palm civet – a cat-like creature in Indonesia, eats fruits, including select coffee cherries. It excretes partially digested seeds that produce a smooth, less acidic brew of coffee called kopi luwak.