any of a genus (Ceratophyllum
) of long, rootless
waterlilies of the hornwort family submerged in lakes and slow-moving
streams and having whorls
designating a family (Ceratophyllaceae) of dicotyledonous, rapidly growing waterlilies
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.