Found in the following dictionaries
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Hydrilla" Definition
noun
A submersed Old World Plant (Hydrilla verticillata) having whorled, lance-shaped leaves and unisexual, solitary, axillary flowers.
Source: American Heritage Dictionary
A freshwater aquatic Asian plant ( of the Hydrocharitaceae family) that has small narrow leaves growing in whorls of three to eight around stems which become heavily branched near the water surface.
Source: Merriam-Webster
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