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 (hôrn′wûrt′, -wôrt′)
1. Any of several small green nonvascular plants of the division Anthocerotophyta, having a flat thallus from which elongated, hornlike spore-producing structures grow.
2. Any of several aquatic vascular plants of the genus Ceratophyllum, forming branched masses in quiet water and having minute unisexual flowers and stiff, forked, whorled leaves resembling antlers or horns.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Plants) any aquatic plant of the genus Ceratophyllum, forming submerged branching masses in ponds and slow-flowing streams: family Ceratophyllaceae
2. (Botany) any of a group of bryophytes belonging to the phylum Anthocerophyta, resembling liverworts but with hornlike sporophytes
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhɔrnˌwɜrt, -ˌwɔrt)

any of several rootless aquatic herbs of the genus Ceratophyllum, having finely dissected, whorled leaves.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hornwort - any aquatic plant of the genus Ceratophyllumhornwort - any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams
Ceratophyllum, genus Ceratophyllum - constituting the family Ceratophyllaceae: hornworts
aquatic plant, hydrophyte, hydrophytic plant, water plant - a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
2.hornwort - liverworts with slender hornlike capsules
Anthocerotales, order Anthocerotales - hornworts; liverworts having a thalloid gametophyte; in some classification systems included in the class Hepaticopsida
hepatic, liverwort - any of numerous small green nonvascular plants of the class Hepaticopsida growing in wet places and resembling green seaweeds or leafy mosses
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
One of the most versatile and widespread species is coontail, also known as hornwort. It's known for its ability to disperse, as it grows both as stalks anchored on the bottom, and in large balls and rafts that can drift about and lodge in new habitat that it can then colonize.
Adding underwater aquatic plants such as anacharis, hornwort and parrot's feather, will add oxygen to the water.
Hornwort and the water buttercup are a good choice here, but avoid Elodea - Canadian pondweed - as this is extremely invasive.
They are classified into three relevant phyla known as Bryophyta (Moss), Marchantiophyta (Liverwort) and Anthocerotophyta (Hornwort).
Submerged species include hornwort, water starwort, frog's lettuce, water violet and water lobelia.
Submerged vegetation (various pondweed, myriophyllum, bladderwort, hornwort, charophyceae) develops in most basins abundantly.
Commonly occurring floating and submerged plants have included duckweed (Lemna spp.) and hornwort (Ceratophyllum demersum).
Onitiri, "Periphyton community on submerged aquatic macrophytes (Hornwort and Bladderwort) in Epe Lagoon, Nigeria," Journal of Agricultural Science Technology, vol.
Common waterweed and hornwort, both submergent plants, are a good choice for their high oxygen content.
Kurschner (2000) reports 224 bryophyte species (one hornwort, 50 liverworts and 173 mosses) from the Arabian Peninsula and Socotra.
X CERATOPHYLLACEAE (Hornwort Family) Ceratophyllum demersum L.