any of a genus (Ceratophyllum) of long, rootless waterlilies of the hornwort family submerged in lakes and slow-moving streams and having whorls of finely divided leaves
Origin of hornwortafter Modern Latin Ceratophyllum: see cerato- and -phyll
designating a family (Ceratophyllaceae) of dicotyledonous, rapidly growing waterlilies
- Any of several small green nonvascular plants of the division Anthocerotophyta, having a flat thallus from which elongated, hornlike spore-producing structures grow.
- Any of several aquatic vascular plants of the genus Ceratophyllum, forming branched masses in quiet water and having minute unisexual flowers and stiff, forked, whorled leaves resembling antlers or horns.