Etymology: Chinook jargon wapatoo, from Cree wāpatowa white mushroom
: either of two plants of the genus Sagittaria (S. latifolia and S. cuneato) having edible tubers
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/wop"euh tooh'/, n., pl. wapatoos.
an arrowhead plant, Sagittaria latifolia.
[1805, Amer.; Chinook Jargon; ulterior orig. uncert.]
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wapato(osee wappatoo.
Useful english dictionary. 2012.