guaraninn.
/ɡwəˈrɑːnɪn/ Chemistry.
A crystalline principle contained in guarana, and regarded by some as identical with caffeine.
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1838 T. Thomson Chem. Org. Bodies 291 Guaranina. This substance was discovered by Theod. Martius, in the guarana.
1841 W. T. Brande Man. Chem. 1230/2 Guaranin [obtained] from the fruit of the Paullinia sorbilis, by Martius.
1880 Libr. Universal Knowl. VII. 134 The essential crystallizable principle is said to be identical with caffeine, but has received the name of guaranine.
This entry has not yet been fully updated (first published 1900; most recently modified version published online December 2020).
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n.1838