guarana

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gua·ra·na

 (gwä′rə-nä′)
n.
1. A shrub or woody vine (Paullinia cupana) of Amazonia whose seeds are high in caffeine and other alkaloids.
2. A preparation made from the seeds of this plant, used in beverages and as an herbal medicine for its stimulant and tonic properties.

[Brazilian Portuguese guaraná, from Tupí *wara'na.]

guarana

(ɡwəˈrɑːnə)
n
(Plants) a climbing shrub, Pauinia cupana, that is native to Venezuela and Brazil and whose seeds contain a higher concentration of caffeine than is found in coffee beans
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