horn·​wort ˈhȯrn-ˌwərt How to pronounce hornwort (audio)
: any of a genus (Ceratophyllum of the family Ceratophyllaceae) of rootless thin-stemmed aquatic monoecious herbs with female flowers having a single carpel

Example Sentences

Recent Examples on the Web Anthocerotae Anthocerotae, also known as hornworts, are the third type of bryophyte. Kevin Espiritu For Partselect.com, Good Housekeeping, 29 Aug. 2017 Oishi said humid cities where moss thrives could benefit most from using bryophytes – a collective term for mosses, hornworts and liverworts – as bioindicators, adding moss could be monitored in its natural environment or cultivated for analysis. Sophie Hares, The Christian Science Monitor, 21 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hornwort.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

circa 1805, in the meaning defined above

Time Traveler
The first known use of hornwort was circa 1805

Dictionary Entries Near hornwort

Cite this Entry

“Hornwort.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hornwort. Accessed 1 Feb. 2023.

Kids Definition


horn·​wort -ˌwərt How to pronounce hornwort (audio)
: any of various plants that usually live in water and are related to the liverworts

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