genus Ceratophyllum

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Noun

1.

genus Ceratophyllum - constituting the family Ceratophyllaceae: hornwortsCeratophyllummagnoliid dicot genus - genus of dicotyledonous flowering plants regarded as among the most primitive of extant angiospermsCeratophyllaceae, family Ceratophyllaceae - coextensive with the genus Ceratophyllum: hornwortshornwort - any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams