tiger-nut

Noun

tiger nut (plural tiger nuts)

1. (especially, in plural) The edible tuber of chufa (Cyperus esculentus).
   • Consequently, once established in some African regions, the tiger nut has become a weed that is difficult to eradicate. The fibrous “nuts” may be eaten raw out of hand, but they are usually roasted or cooked and added to soups.2004, Frederic Rosengarten, Jr., The Book of Edible Nuts, Courier Corporation, →ISBN, page 332