hornwort
hornwort Lexical Profile
hornwort Game Scores & Validity
• noun
Any cosmopolitan, submerged, rootless aquatic flowering plant of the genus Ceratophyllum (especially C. demersum), bearing whorled, finely forked, horn-like leaves and tiny, inconspicuous greenish axillary flowers that bloom underwater, widely cultivated in ponds and freshwater aquariums.
"The aquarist added several stems of floating hornwort to the breeding tank to oxygenate the water and provide dense cover for the newly hatched fry."
Any of a division (Anthocerotophyta) of small, non-vascular, bryophyte plants related to mosses and liverworts, found globally in damp or humid habitats and characterized by a flattened green thallus and long, tapered, horn-shaped sporophytes.
"During the field excursion, the botany students identified several patches of hornwort growing alongside liverworts on the shaded, muddy riverbank."
Word Nuance & Usage
In botany and horticulture, 'hornwort' refers to two completely unrelated groups of plants: non-vascular bryophytes (division Anthocerotophyta) that grow on damp soil, and submerged aquatic flowering plants (genus Ceratophyllum) commonly used in freshwater aquariums.
• Nearby Words
Word Origin & Etymology
Formed in English from 'horn' and 'wort' (from Old English 'wyrt', meaning 'plant' or 'root'), referring either to the elongated, horn-shaped spore capsules of the bryophyte or the stiff, forked, horn-like leaves of the aquatic plant.
Usage Trend
Historical frequency of usage in published text.