Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of several small green nonvascular plants of the division Anthocerotophyta, having a flat thallus from which elongated, hornlike spore-producing structures grow.
- noun 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.
from The Century Dictionary.
- noun An aquatic plant of the genus Ceratophyllum, the single species of which, C. demersum, is common in ponds and slow streams in most parts of the world. See cut under
Ceratophyllaceæ .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bot.) An aquatic plant (Ceratophyllum), with finely divided leaves.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
bryophyte with a leaflessthallus characterized by a dominantgametophyte stage of the life cycle and asporophyte stage shaped like ahorn .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun liverworts with slender hornlike capsules
- noun any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Even so, I bought the hornwort and three white clouds and went home.
Day in the Life of an Idiot lyda222 2008
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Other good kinds are hornwort, water starwort, tape grass, water poppy, milfoil, willow moss, and floating plants like duckweed.
Outdoor Sports and Games Claude H. Miller
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In quiet fresh-water streams, and especially in ponds, there are _Myriophyllums_ (or water-milfoil), _Ceratophyllums_ (or hornwort), the aquatic
St. Nicholas Magazine for Boys and Girls, Vol. 5, July 1878, No. 9 Various 1868
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Grass, milfoil, water crowfoot, hornwort, starwort, horsetail, and a dozen other delicate plants, form one tangled forest, denser than those of the Amazon, and more densely peopled likewise.
Prose Idylls, New and Old Charles Kingsley 1847
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In B we find remains of some of the same plants which were enumerated as common in the ancient lignite in 3 prime, such as the yellow water-lily and hornwort, together with some freshwater shells which occur in the same fluvio-marine series 3 prime.
The Antiquity of Man Charles Lyell 1836
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Weed fragments were found by NIWA staff in March last year and said they were likely to have arrived on a vessel used in nearby hornwort-infested lakes.
NZ On Screen 2010
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In a hornwort the sporophytes are erect and needle-like.
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In a hornwort the sporophytes are erect and needle-like.
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Anthocerotales by the U.S. Department of Agriculture Survey of hornwort populations in selected arable fields in the Swiss Plateau Irene Bisang, Luc Lienhard und Ariel Bergamini, unknown publisher, July 2008.
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In some anthoceros, the hornwort presents pores in the capsule walls or lacks them.
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