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.
ADJECTIVE:
Of, relating to, or belonging to the phylum Cnidaria.
ETYMOLOGY: New Latin Cndria, phylum name, from Greek knd, sea nettle
(n
-dâr
-
n) KEY 
ria, phylum name, from Greek kn
