guarana
noun
gua·ra·na ˌgwä-rə-ˈnä 
: a dried paste that is made from the seeds of a South American climbing shrub (Paullinia cupana) of the soapberry family, that contains caffeine and tannin, and that is used as a stimulant
also : this plant
Example Sentences
Recent Examples on the Web The supplement also includes stimulants such as caffeine and guarana, which aid with concentration and motivation. 
The Salt Lake Tribune, 25 May 2022 These supplements often contain caffeine, guarana, green tea, or other stimulants. Amy Capetta, Woman's Day, 19 May 2022 The beverage is is made with guarana extracts and B-vitamins, has 114 mg of caffeine per 12-ounce serving. Jordan Valinsky, CNN, 15 May 2021 The drink has more than three times the caffeine of a regular Coke and contains guarana, a supplement popular in energy drinks. Jennifer Maloney, WSJ, 14 May 2021 Often these supplements contain caffeine, guarana, green tea or other stimulants. Kelsey Hurwitz, Woman's Day, 8 Sep. 2020 Lightly carbonated, the energy drink contains caffeine, B vitamins, ginseng, guarana and taurine. Mark Heim | Mheim@al.com, al, 13 Aug. 2020 Energy drinks, while sporting much less sugar than their rivals, contain potentially dangerous stimulants such as caffeine, guarana, taurine, ginseng, l-carnitine and creatine. Sandee Lamotte, CNN, 23 June 2020 Coke Energy, which is made with guarana extracts and B-vitamins, has 114 mg of caffeine per 12-ounce serving. Danielle Wiener-bronner, CNN, 30 Jan. 2020 See More
The Salt Lake Tribune, 25 May 2022 These supplements often contain caffeine, guarana, green tea, or other stimulants. Amy Capetta, Woman's Day, 19 May 2022 The beverage is is made with guarana extracts and B-vitamins, has 114 mg of caffeine per 12-ounce serving. Jordan Valinsky, CNN, 15 May 2021 The drink has more than three times the caffeine of a regular Coke and contains guarana, a supplement popular in energy drinks. Jennifer Maloney, WSJ, 14 May 2021 Often these supplements contain caffeine, guarana, green tea or other stimulants. Kelsey Hurwitz, Woman's Day, 8 Sep. 2020 Lightly carbonated, the energy drink contains caffeine, B vitamins, ginseng, guarana and taurine. Mark Heim | Mheim@al.com, al, 13 Aug. 2020 Energy drinks, while sporting much less sugar than their rivals, contain potentially dangerous stimulants such as caffeine, guarana, taurine, ginseng, l-carnitine and creatine. Sandee Lamotte, CNN, 23 June 2020 Coke Energy, which is made with guarana extracts and B-vitamins, has 114 mg of caffeine per 12-ounce serving. Danielle Wiener-bronner, CNN, 30 Jan. 2020 See More Word History
Etymology
Portuguese guaraná, from Nhengatu (Tupi-based lingua franca of Amazonia), from Sateré-Mawé (Tupian language of the middle Amazon River basin) warana
First Known Use
1838, in the meaning defined above
Medical Definition
guarana
noun
gua·ra·na ˌgwär-ə-ˈnä
: a dried paste made from the seeds of a Brazilian climbing shrub (Paullinia cupana) containing tannin and caffeine and used in making an astringent drink