Jerusalem artichoke

(noun) edible tuber of the Jerusalem artichoke.

(noun) tall perennial with hairy stems and leaves; widely cultivated for its large irregular edible tubers. Synonyms: girasol, Jerusalem artichoke sunflower, Helianthus tuberosus.

(noun) sunflower tuber eaten raw or boiled or sliced thin and fried as Saratoga chips. Synonyms: sunchoke.