Noun | 1. | Xanthosoma - tropical American tuberous perennials liliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed malanga, spoonflower, tannia, Xanthosoma atrovirens, Xanthosoma sagittifolium, yautia - tropical American aroid having edible tubers that are cooked and eaten like yams or potatoes |