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frog's-bit

[frogz-bit, frawgz-]
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noun
  1. an aquatic, floating plant, Hydrocharis morsus-ranae, of Eurasia, having thick, roundish, spongy leaves.
  2. an aquatic, floating plant, Limnobium spongia, of tropical America, having reddish-brown spotted, oblong, heart-shaped, or ovate leaves.
Also frogbit.

Origin of frog's-bit

First recorded in 1570–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for frog-bit

frog-bit

noun
  1. a floating aquatic Eurasian plant, Hydrocharis morsus-ranae, with heart-shaped leaves and white flowers: family Hydrocharitaceae
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012