Cnidaria

[nahy-dair-ee-uh]

Origin

noun Zoology.

an alternative name for the invertebrate phylum Coelenterata, giving emphasis to the stinging structures as characteristic of the phylum.

Origin:
< Neo-Latin; see cnida, -aria

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Cnidaria is always a great word to know.

So is reptile. Does it mean:

cold-blooded vertebrate such as turtles, snakes, lizards, crocodilians, amphisbaenians and tuatara

phylum comprised of annelids

Etymonline

Word Origin & History

Cnidaria

phylum of stinging invertebrates, from Mod.L. cnida, from Gk. knide "nettle," from stem of knizein "to scratch scrape."

Online Etymology Dictionary, © 2010 Douglas Harper
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