equisetum
noun
eq·ui·se·tum ˌe-kwə-ˈsē-təm 
plural equisetums or equiseta ˌe-kwə-ˈsē-tə
: horsetail
Example Sentences
Recent Examples on the Web Clover has risen to the top of the list, replacing equisetum, which always disappears and people forget about it. 
Jeff Lowenfels, Anchorage Daily News, 5 Aug. 2021 Veteran gardeners know them well: chickweed and equisetum. Jeff Lowenfels, Anchorage Daily News, 28 May 2020 The only downside was that my property has a great deal of equisetum (horsetail), which enjoyed spreading its roots into the spaces left by the wavy layer in the middle. oregonlive, 5 Jan. 2020 Not only do equisetum spread by underground roots, but also by above ground spores. Jeff Lowenfels, Anchorage Daily News, 31 May 2018 These tools are great for cutting down equisetum, grasses and weeds along buildings, swings, fences, under shrubs and around trees. Jeff Lowenfels, Alaska Dispatch News, 23 June 2017
Jeff Lowenfels, Anchorage Daily News, 5 Aug. 2021 Veteran gardeners know them well: chickweed and equisetum. Jeff Lowenfels, Anchorage Daily News, 28 May 2020 The only downside was that my property has a great deal of equisetum (horsetail), which enjoyed spreading its roots into the spaces left by the wavy layer in the middle. oregonlive, 5 Jan. 2020 Not only do equisetum spread by underground roots, but also by above ground spores. Jeff Lowenfels, Anchorage Daily News, 31 May 2018 These tools are great for cutting down equisetum, grasses and weeds along buildings, swings, fences, under shrubs and around trees. Jeff Lowenfels, Alaska Dispatch News, 23 June 2017 Word History
Etymology
New Latin, from Latin equisaetum horsetail plant, from equus horse + saeta bristle
First Known Use
1761, in the meaning defined above