1. plural of guarana; a tropical South American climbing plant with caffeine-rich seeds used to make beverages and supplements
Usage: often used in reference to the plant itself or its seeds; commonly found in energy drinks and dietary supplements
2. beverages or products made from guarana seeds, typically consumed for their stimulant properties
Usage: used as a mass noun or count noun depending on context

Examples

• Guaranas are native to the Amazon rainforest and have been used by indigenous peoples for centuries.
• Many health food stores sell guaranas in powder form for making smoothies.
• The seeds of guaranas contain more caffeine than coffee beans.
• Popular energy drinks often include guaranas as a key ingredient.
• Guaranas are known for providing a sustained energy boost without the crash associated with sugar.
• Some athletes prefer guaranas over traditional caffeine supplements.