1. primitive flowerless plants with hollow jointed stems and small leaves arranged in whorls, belonging to the genus Equisetum
Usage: botanical
2. the long hair that grows from the tail of a horse

Examples

• Horsetails are among the oldest living plant species on Earth.
• The wetland was filled with tall horsetails growing near the water’s edge.
• Ancient horsetails grew as large as trees during the Carboniferous period.
• She collected horsetails from the marsh for her botanical study.
• The artist used actual horsetails from horses to make traditional brushes.
• Horsetails contain silica, making them useful for polishing metal.
• The field guide helped us identify the different species of horsetails.