- 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
- any tracheophyte plant of the genus Equisetum, which comprises the horsetails
C19: New Latin, changed from Latin equisaetum, from equus horse + saeta bristle