ˌekwəˈsēd.əm noun
Etymology: New Latin, from Latin equisaetum horsetail (plant), from equi- (from equus horse) + -saetum (from saeta, seta bristle) — more at equine , sinew
1. capitalized : the type genus of Equisetaceae comprising perennial plants that spread by creeping rhizomes, are homosporous and asexual, and have leaves reduced to more or less conspicuous nodal sheaths on the hollow jointed grooved shoots that may all bear asexual spores provided with elaters in sporangia arranged on conical spikes or in some cases may be differentiated into sterile and fertile shoots
2. plural equisetums -d.əmz or equise·ta -d.ə : any plant of the genus Equisetum
[s]equisetu.jpg[/s] [
equisetum: 1 vegetative plant, 2 fertile plant
]