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[hawrn-wurt, -wawrt] /ˈhɔrnˌwɜrt, -ˌwɔrt/
any aquatic plant of the genus Ceratophyllum, found in ponds and slow streams.
Origin of hornwort
1795-1805; horn + wort2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for hornwort
Historical Examples
  • It is the hornwort (Ceratophyllum) gently wriggling or moving from side to side.

    The Romance of Plant Life G. F. Scott Elliot
British Dictionary definitions for hornwort


any aquatic plant of the genus Ceratophyllum, forming submerged branching masses in ponds and slow-flowing streams: family Ceratophyllaceae
any of a group of bryophytes belonging to the phylum Anthocerophyta, resembling liverworts but with hornlike sporophytes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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hornwort in Science
  (hôrn'wûrt', -wôrt')   
Any of about 100 species of small bryophyte plants belonging to the phylum Anthocerophyta. Unlike liverworts but like mosses, hornwort sporophytes have stomata. The hornwort gametophyte consists of a low thallus, out of which numerous slender, upright sporophytes tipped with sporangia grow. The sporophyte has a meristem that elongates the sporophyte with new growth, a feature that distinguishes the plant from the other bryophytes. The name of the hornworts was suggested by the hornlike appearance of the sporophytes. See more at bryophyte.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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