1. Any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams
   "Hornwort provided shelter for small fish in the pond"
    
2. Liverworts with slender hornlike capsules
   "Hornworts are often found growing in moist, shady areas"

Derived forms: hornworts

Type of: aquatic plant, hepatic, hydrophyte, hydrophytic plant, liverwort, water plant

Part of: Anthocerotales, Ceratophyllum, genus Ceratophyllum, order Anthocerotales

Encyclopedia: Hornwort