Anacharis \An*ach"a*ris\, n. [NL., fr. Gr. 'ana` up + xa`ris
grace.] (Bot.)
A fresh-water weed of the frog's-bit family
({Hydrocharidaceae}), native to America. Transferred to
England it became an obstruction to navigation. Called also
{waterweed} and {water thyme}.
[1913 Webster] Anachoret