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.
opacous (not comparable)
(obsolete, chiefly, poetic) Not shining or illuminated; dark. [17th-20th c.]
(obsolete) Not allowing the passage of light; opaque. [17th-19th c.]
The upper wings are opacous; at their hinder ends, where they lap over, transparent, like the wing of a fly.
Source: Wiktionary
O*pa"cous, a. Etym: [L. opacus. See Opaque.]
Definition: Opaque. [R.] Milton.
– O*pa"cous*ness, n. [R.]
Source: Webster’s Unabridged Dictionary 1913 Edition
16 April 2025
(adjective) marked by richness and fullness of flavor; “a rich ruby port”; “full-bodied wines”; “a robust claret”; “the robust flavor of fresh-brewed coffee”
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.