swan potato

noun

: a plant of the genus Sagittaria having tubers used as food: such as

a

: a common arrowhead (S. latifolia) of wetlands of the U.S. and southern Canada with starchy tubers once used extensively by American Indians

b

: a similar common Old World arrowhead (S. sagittifolia) that is sometimes cultivated in Japan and China

Word History

Etymology

alteration of swamp potato

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