horsetail
/ˈhɔː(ɹ)s.teɪl/ noun
Forms horsetails horse tail
- noun (literal) A tail of a horse.
- noun (botany) Any of various simple vascular plants, of the order Equisetales, that have hollow stems and produce spores.
- noun (military) A 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.”
- noun (botany) A mare's tail, a water plant in genus Hippuris.
- noun Any waterfall, the descending water of which maintains contact with bedrock most of the time.
- noun (anatomy) cauda equina, a bundle of nerve fibers.
- noun (rare) A ponytail hairstyle.
Etymology
From Middle English horsetaile, horstaile, equivalent to horse + tail.
Webster’s 1913
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “horsetail”, CC BY-SA 4.0. Details