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.
pinger
(noun) a pulse generator used for echo sounding in sonar
Source: WordNet® 3.1
pinger (plural pingers)
A device that emits a short, high-pitched sound burst, such as in sonar or other echo location systems.
A device that periodically emits a signal that can be monitored to permit movement tracking.
A computer program that sends a ping message over a network.
A user of a ping program; one who pings.
(slang) An illicit drug, especially ecstasy, taken for recreational purposes.
Source: Wiktionary
29 May 2025
(adjective) characterized by careful evaluation and judgment; “a critical reading”; “a critical dissertation”; “a critical analysis of Melville’s writings”
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.