pondwort noun2 •A submerged aquatic plant native to Europe and northwestern Asia (Stratiotes aloides).[…] and the arrow-shaped leaves of the blue spiked pondwort and rosy flowers of the persicaria, form a beautiful sight on hot sunny days. — 1857 •A plant, horned pondweed, found in fresh to brackish waters, with long, threadlike leaves (Zannichellia palustris).
