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.
diamine
(noun) any organic compound containing two amino groups
Source: WordNet® 3.1
diamine (plural diamines)
(chemistry) Any compound containing two amino functional groups.
• -amidine, amidine
Source: Wiktionary
Di*am"ine (; 104), n. Etym: [Pref. di- + amine.] (Chem.)
Definition: A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide.
Note: In chemical nomenclature, if any amine or diamine is named by prefixing the nitrogen group, the name of the latter takes the form of amido, diamido, etc., thus ethylene diamine, C2H4.(NH2)2, is also called diamido-ethylene.
Source: Webster’s Unabridged Dictionary 1913 Edition
6 June 2025
(noun) wit having a sharp and caustic quality; “he commented with typical pungency”; “the bite of satire”
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.