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.
francium, Fr, atomic number
(noun) a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Source: WordNet® 3.1
francium (usually uncountable, plural franciums)
The chemical element (symbol Fr) with an atomic number of 87. It is an intensely radioactive alkali metal that is not found in nature.
(countable) A single atom of this element.
• actinium-K (obsolete)
• virginium (obsolete)
Source: Wiktionary
30 January 2025
(noun) a severe dermatitis of herbivorous domestic animals attributable to photosensitivity from eating Saint John’s wort
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.