Definitionen
1.NounA tail of a horse. (Can we add an example for this sense?)
2.NounAny of various simple vascular plants, of the order Equisetales, that have hollow stems and produce spores.
3.NounA Turkish standard denoting rank."Commanders were distinguished by the number of horsetails carried before them. The sultan had seven, the grand vizier five, and the pashas three, two, or one."
4.NounA mare's tail, a water plant in genus Hippuris.
5.NounAny waterfall, the descending water of which maintains contact with bedrock most of the time.
6.Nouncauda equina, a bundle of nerve fibers.
7.NounA ponytail hairstyle.