from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity, and including the jellyfishes, hydras, sea anemones, and corals. Also called coelenterate.
- adj. Of, relating to, or belonging to the phylum Cnidaria.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
New Latin Cnīdāria, phylum name, from Greek knīdē, sea nettle.(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin cnidaria + -an (Wiktionary)