noun, masculine/tɔ.pi.nɑ̃.buʁ/plural: topinambours
Jerusalem artichoke (Helianthus tuberosus)
Synonyms: artichaut de Jérusalem, artichaut du Canada, soleil vivace
From earlier plural forms topinambaux or topinambaulx, from Old Tupi tupinambá, the name of a South American tribe where the plant was thought to have originated, 1650s.