guayusa

[gwahy-yoo-suh, wahy-]
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noun

a tree, Ilex guayusa, native to the rainforest in the upper Amazon river basin.
the leaves of this tree, containing caffeine, theobromine, theophylline, and other compounds, prepared as a tea and used as a stimulant.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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