ˌpäd.əmōˈjēˌtän noun
Etymology: New Latin, from Latin, pondweed, from Greek potamogeitōn, from potamos river + geitōn neighbor
1. capitalized : a large genus of aquatic herbs (family Potamogetonaceae) that are found in quiet waters throughout temperate regions and have spicate flowers with a four-parted perianth and usually floating leaves — see pondgrass , pondweed
2. -s : any plant of the genus Potamogeton