Equisetum Eq`ui*se"tum, n.; pl. {Equiseta}. [L., the horsetail, fr. equus horse + seta a thick,, stiff hair, bristle.] (Bot.) A genus of vascular, cryptogamic, herbaceous plants; -- also called {horsetails}. [1913 Webster]

Note: The {Equiseta} have hollow jointed stems and no true leaves. The cuticle often contains siliceous granules, so that one species ({E. hyemale}) is used for scouring and polishing, under the name of {Dutch rush} or {scouring rush}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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