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.
knobby, knobbly
(adjective) having knobs; “had knobbly knees”
Source: WordNet® 3.1
knobbly (comparative knobblier, superlative knobbliest)
Having a covering of small knobs.
Source: Wiktionary
5 October 2024
(noun) mattress consisting of a pad of cotton batting that is used for sleeping on the floor or on a raised frame
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.