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.
imperceptible, unperceivable
(adjective) impossible or difficult to perceive by the mind or senses; “an imperceptible drop in temperature”; “an imperceptible nod”; “color is unperceivable to the touch”
Source: WordNet® 3.1
imperceptible (comparative more imperceptible, superlative most imperceptible)
not perceptible, not detectable, too small in magnitude to be observed
Synonyms: imperceivable, undistinguishable, unperceivable
Antonyms: detectable, perceptible
Source: Wiktionary
Im`per*cep"ti*ble, a. Etym: [Pref. im- not + perceptible: cf. F. imperceptible.]
Definition: Not perceptible; not to be apprehended or cognized by the souses; not discernible by the mind; not easily apprehended. Almost imperceptible to the touch. Dryden. Its operation is slow, and in some cases almost imperceptible. Burke.
– Im`per*cep"ti*ble*ness, n.
– Im`per*cep"ti*bly, adv. Their . . . subility and imperceptibleness. Sir M. Hale.
Source: Webster’s Unabridged Dictionary 1913 Edition
23 January 2025
(adjective) being or located on or directed toward the side of the body to the west when facing north; “my left hand”; “left center field”; “the left bank of a river is bank on your left side when you are facing downstream”
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.