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.
TYMPANS
Noun
tympans
plural of tympan
Source: Wiktionary
TYMPAN
Tym"pan, n. Etym: [F., fr. tympanum a kettledrum, a panel of a door. See Tympanum, and cf. Tymp.]
1. A drum. [Obs.]
2. (Arch.)
Definition: A panel; a tympanum.
3. (Print.)
Definition: A frame covered with parchment or cloth, on which the blank sheets are put, in order to be laid on the form to be impressed. Tympan sheet (Print.), a sheet of paper of the same size as that to be printed, pasted on the tympan, and serving as a guide in laying the sheets evenly for printing. W. Savage.
Source: Webster’s Unabridged Dictionary 1913 Edition
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