- any plant of the genus Equisetum, comprising the horsetails.
Origin of equisetum
1820–30; < New Latin; Latin equisaetum, equivalent to equi-, combining form of equus horse + saet(a) bristle + -um neuter noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for equisetum
At about 5,000 feet I first saw horsetails (Equisetum), very like our own species.The Malay Archipelago
Alfred Russell Wallace
Insipid milk, and lead-coloured butter, from equisetum fluviatile.
In this connection his figuring young plants of Equisetum attached to prothalli is interesting.
Near the shore grew the Naked Horse-tail (Equisetum hyemale), having a shoot springing from its root on each side.
The corn-fields here produce Echioides (Lycopsis arvensis), and the woods the most slender kind of Equisetum (sylvaticum).
- any tracheophyte plant of the genus Equisetum, which comprises the horsetails
C19: New Latin, changed from Latin equisaetum, from equus horse + saeta bristle