Definition of Ruppia
: a small genus of widely distributed submerged marine herbs (family Hydrocharitaceae) having capillary stems, slender alternate leaves, and monoecious flowers destitute of perianth — see ditch grass
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Origin and Etymology of ruppia
New Latin, from Heinrich B. Ruppius (Rupp) †1719 German botanist + New Latin -ia
First Known Use: 1770
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