feather-foil
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| Noun | 1. |  feather-foil - a plant of the genus Hottonia genus Hottonia, Hottonia - aquatic herbs American featherfoil, Hottonia inflata, water gillyflower - a featherfoil of the eastern United States with submerged spongy inflated flower stalks and white flowers Hottonia palustris, water violet - featherfoil of Europe and western Asia having submerged and floating leaves and violet flowers aquatic plant, hydrophyte, hydrophytic plant, water plant - a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth |