noun horn·wort \ˈhȯrn-ˌwərt, -ˌwȯrt\

Definition of hornwort

  1. :  any of a genus (Ceratophyllum of the family Ceratophyllaceae) of rootless thin-stemmed aquatic monoecious herbs with female flowers having a single carpel

Circa 1805

First Known Use of hornwort

circa 1805

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