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.
PENTODE
pentode
(noun) a thermionic tube having five electrodes
Source: WordNet® 3.1
Etymology
Noun
pentode (plural pentodes)
a thermionic valve similar to a tetrode with the addition of a third grid, the suppressor grid; was/is used in high quality audio and radio products
Hypernyms
• vacuum tube
Hyponyms
• output pentode
• RF pentode
Meronyms
• cathode
• control grid (g1)
• screen grid (g2)
• suppressor grid (g3)
• anode (also called: plate)
Source: Wiktionary
Recent Word Finds
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28 March 2025
HOST
(noun) a person who invites guests to a social event (such as a party in his or her own home) and who is responsible for them while they are there
Coffee Trivia
