hornwort
(ˈhɔːnwɜːt)
[f. horn n.1 + wort, after Gr. κερατόϕυλλον, i.e. horn-leaf: from the appearance of the branched stem.]
A book-name of Ceratophyllum demersum, an aquatic plant with dense whorls of finely-divided leaves; also called horned pondweed.
| 1805 J. Galpine Brit. Bot. (1806) 399. 1857 Henfrey Bot. 384 Ceratophyllaceæ, the Hornwort Order. 1885 Geikie Text-bk. Geol. (ed. 2) 880 Cones of Scotch fir and spruce,..hornwort, blackthorn, bog-bean. |