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.
stratus, stratus cloud
(noun) a large dark low cloud
Source: WordNet® 3.1
stratus (usually uncountable, plural strati)
(meteorology) A principal, low-level cloud type in the form of a gray layer with a rather uniform base, usually not associated with precipitation, and capable of producing corona phenomena and a weak, uniform luminance; abbreviated St.
Source: Wiktionary
Stra"tus, n. Etym: [L. stratus a spreading out, scattering, from sternere, stratum, to spread.] (Meteor.)
Definition: A form of clouds in which they are arranged in a horizontal band or layer. See Cloud.
Source: Webster’s Unabridged Dictionary 1913 Edition
27 June 2025
(adjective) having four equal sides and four right angles or forming a right angle; “a square peg in a round hole”; “a square corner”
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.