'Hornwort' definitions:
Definition of 'hornwort'
(from WordNet)
noun
Any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams
noun
Liverworts with slender hornlike capsules
Definition of 'Hornwort'
From: GCIDE
- Hornwort \Horn"wort`\, n. (Bot.) An aquatic plant (Ceratophyllum), with finely divided leaves. [1913 Webster]