water maizen. [ < watern. + maizen., after French maïs d'eau or its model Spanish maiz del agua (both 1835 in the same source, or earlier)] rare the edible starchy seeds of the giant water lily of South America, Victoria amazonica; the plant itself.
ΚΠ
1838 Edwards's Bot. Reg.24 14 The seeds, as large as peas, are used as food under the name of Water maize.
1900 Amer. Dict. & Cycl. X. 4409/3 The plant is..called Water Maize by the natives of the region where it grows.