stonewort

[ stohn-wurt, -wawrt ]
/ ˈstoʊnˌwɜrt, -ˌwɔrt /

noun

any of a plantlike group of green algae constituting the class Charophyceae, having a jointed body frequently encrusted with lime and usually attached to the bottom in fresh water.

Origin of stonewort

First recorded in 1575–85; stone + wort2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for stonewort

stonewort
/ (ˈstəʊnˌwɜːt) /

noun

any of various green algae of the genus Chara, which grow in brackish or fresh water and have jointed fronds encrusted with lime
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