Main Entry:

horse·tail

Pronunciation:

\ˈhȯrs-ˌtāl\

Function:

noun

Date:

15th century

: any of a genus (Equisetum of the order Equisetales) of lower tracheophytes comprising perennial plants that spread by creeping rhizomes and have leaves reduced to nodal sheaths on the hollow jointed ribbed shoots

[horsetail illustration]