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.
BIPRISM
biprism
(noun) an optical device for obtaining interference fringes
Source: WordNet® 3.1
Etymology
Noun
biprism (plural biprisms)
(mathematics) A fusion of two triangular prisms
(physics) An optical device of this construction used to generate interference fringes
Source: Wiktionary
Bi"prism, n. [Pref. bi- + prism.]
1.
Definition: A prism whose refracting angle is very nearly 180 degrees.
2. A combination of two short rectangular glass prisms cemented together at their diagonal faces so as to form a cube; -- called also optical cube. It is used in one form of photometer.
Source: Webster’s Unabridged Dictionary 1913 Edition
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2 June 2025
FOOTING
(noun) status with respect to the relations between people or groups; “on good terms with her in-laws”; “on a friendly footing”
Coffee Trivia
