[ nahy-dair-ee-uhn ]
/ naɪˈdɛər i ən /
Save This Word!
any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a coelenterate.
belonging or pertaining to the Cnidaria.
QUIZ YOURSELF ON “THEIR,” “THERE,” AND “THEY’RE”
Are you aware how often people swap around “their,” “there,” and “they’re”? Prove you have more than a fair grasp over these commonly confused words.
Question 1 of 7
Which one of these commonly confused words can act as an adverb or a pronoun?
Words nearby cnidarian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for cnidarian
/ (naɪˈdɛərɪən, knaɪ-) /
any invertebrate of the phylum Cnidaria, which comprises the coelenterates
of, relating to, or belonging to the Cnidaria
Word Origin for cnidarian
C20: from New Latin Cnidaria, from Greek knidē nettle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for cnidarian
[ nī-dâr′ē-ən ]
Any of various invertebrate animals of the phylum Cnidaria, having a body with radial symmetry and tentacles that bear microscopic stinging capsules called nematocysts. The tentacles surround a mouth that opens into a saclike internal cavity and that is used both for ingesting food and for eliminating wastes. Cnidarians evolved in the Precambrian Era, but it is not known from what type of organism. Cnidarians include the jellyfishes, hydras, sea anemones, and corals.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.