horn·​wort | \ ˈhȯrn-ˌwərt How to pronounce hornwort (audio) , -ˌwȯrt\

Definition of hornwort

: any of a genus (Ceratophyllum of the family Ceratophyllaceae) of rootless thin-stemmed aquatic monoecious herbs with female flowers having a single carpel

Examples of hornwort in a Sentence

Recent Examples on the Web

Anthocerotae Anthocerotae, also known as hornworts, are the third type of bryophyte. Kevin Espiritu For Partselect.com, Good Housekeeping, "How And Why You Should Try Growing Moss In Your Garden," 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, "Moss could be used to monitor urban pollution, Japanese scientists say," 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.

First Known Use of hornwort

circa 1805, in the meaning defined above

Keep scrolling for more

Learn More about hornwort

Dictionary Entries near hornwort

horn timber




horn wrack


horny coral

Statistics for hornwort

Look-up Popularity

Time Traveler for hornwort

The first known use of hornwort was circa 1805

See more words from the same year

More from Merriam-Webster on hornwort

Rhyming Dictionary: Words that rhyme with hornwort

Britannica.com: Encyclopedia article about hornwort

Comments on hornwort

What made you want to look up hornwort? Please tell us where you read or heard it (including the quote, if possible).


miscellaneous remnants or debris

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!