There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.
electroscope
(noun) measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
Source: WordNet® 3.1
electroscope (plural electroscopes)
(physics) a simple device that detects the presence of an electric charge by the mutual repulsion of metal foils or pith balls
Source: Wiktionary
E*lec"tro*scope, n. Etym: [Electro- + -scope: cf. F. électroscope.] (Physics)
Definition: An instrument for detecting the presence of electricity, or changes in the electric state of bodies, or the species of electricity present, as by means of pith balls, and the like. Condensing electroscope (Physics), a form of electroscope in which an increase of sensibility is obtained by the use of a condenser.
Source: Webster’s Unabridged Dictionary 1913 Edition
20 April 2025
(noun) food mixtures either arranged on a plate or tossed and served with a moist dressing; usually consisting of or including greens
There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.