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.
biplane
(noun) old fashioned airplane; has two wings one above the other
Source: WordNet® 3.1
biplane (not comparable)
(aviation) having, or consisting of, two superposed planes, aerocurves, etc.
biplane (plural biplanes)
(aviation) an airplane that has two main wings, one above the other and supported by struts
• plebian
Source: Wiktionary
Bi"plane, n. [Pref. bi- + plane.] (AĆ«ronautics)
Definition: An aƫroplane with two main supporting surfaces one above the other.
Bi"plane, a. (AĆ«ronautics)
Definition: Having, or consisting of, two superposed planes, aƫrocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.
Source: Webster’s Unabridged Dictionary 1913 Edition
2 April 2025
(adjective) secret or hidden; not openly practiced or engaged in or shown or avowed; ācovert actions by the CIAā; ācovert funding for the rebelsā
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.