any green algae of the class Charophyceae (or group Charophyta), comprising the stoneworts.

Origin of charophyte

< New Latin Charophyta, equivalent to Char(a) a genus of stoneworts (Latin: a plant of uncertain identity found in Epirus) + -o- -o- + Greek phŷta, plural of phŷton -phyte Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019