hornwort

Noun

horn=wort

CIDE DICTIONARY

hornwort, n.

An aquatic plant (Ceratophyllum), with finely divided leaves. [1913 Webster]

hornwort, n. any aquatic rootless plant of the genus Ceratophyllum, with forked leaves.

For further exploring for "hornwort" in Webster Dictionary Online

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TIP #04: Try using range (OT and NT) to better focus your searches. [ALL]