cnidarian


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cni·dar·i·an

 (nī-dâr′ē-ən)
n.
Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity and stinging nematocysts, and including the jellyfishes, hydras, sea anemones, and corals.

[New Latin Cnīdāria, phylum name, from Greek knīdē, sea nettle.]

cni·dar′i·an adj.

cnidarian

(naɪˈdɛərɪən; knaɪ-)
n
(Animals) any invertebrate of the phylum Cnidaria, which comprises the coelenterates
adj
(Animals) of, relating to, or belonging to the Cnidaria
[C20: from New Latin Cnidaria, from Greek knidē nettle]

cni•dar•i•an

(naɪˈdɛər i ən)

n.
1. any radially symmetric invertebrate of the phylum Cnidaria, including the hydras, jellyfishes, sea anemones, and corals, characterized by stinging cells and a saclike digestive cavity with a single opening surrounded by tentacles. Compare coelenterate.
adj.
2. of or pertaining to the cnidarians.
[1930–35; < New Latin Cnidari(a) (see cnida, -aria) + -an1]

cni·dar·i·an

(nī-dâr′ē-ən)
Any of various invertebrate animals that have a body with radial symmetry, tentacles, and a sac-like internal cavity. They have a single opening for ingesting food and eliminating wastes. Cnidarians include the jellyfishes, hydras, sea anemones, and corals. Also called coelenterate.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cnidarian - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structurescnidarian - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
coelenteron - the saclike body cavity of a coelenterate
invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
Cnidaria, Coelenterata, phylum Cnidaria, phylum Coelenterata - hydras; polyps; jellyfishes; sea anemones; corals
polyp - one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth; "in some species of coelenterate, polyps are a phase in the life cycle that alternates with a medusoid phase"
medusan, medusoid, medusa - one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles
jellyfish - any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
scyphozoan - any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle
hydroid, hydrozoan - colonial coelenterates having the polyp phase dominant
actinozoan, anthozoan - sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
Translations
žahavec
cnidario
References in periodicals archive ?
The invasion was cross-faunal; immigrant taxa included arthropod, brachiopod, mollusk, echinoderm, cnidarian and bryozoan genera.
We propose to test this hypothesis by studying the role of epigenetics in stem cell fate determination in the cnidarian Hydractinia echinata, an animal model that occupies a phylogenetically pivotal position at the base of the animal kingdom,and is genetically tractable and susceptible to genetically manipulation.
Experts thought that Cotyledion tylodes may have belonged to the jellyfish-like cnidarian group, but new anatomical evidence from the animal's fossilised remains suggests the species was an early member of the group of small marine organisms called entoprocts.
Cnidarian medusae are important components of pelagic ecosystems, but are among the rarest of fossils--partly because most of them are completely soft-bodied, and partly because once buried or stranded they are attractive resources for scavenging fauna and microorganisms.
In South Africa 492 species of invertebrates have been assessed according to the IUCN Red List criteria, including 250 insects (14 Colophon, 3 ant, 76 butterfly and 157 odonatan species), 29 crustacean, 31 diplopod, 97 cnidarian, 81 mollusc and four onychophoran species.
Many cnidarian jellyfish, some corals and comb jellies (ctenophores) that are seasonally abundant on Florida coastal waters also light up dark waters, particularly when disturbed.
In this project, we are developing molecular markers to identify various cnidarian groups.
Craspedacusta sowerbii, the only species of freshwater cnidarian exhibiting a medusa stage in its life cycle, was collected from an excavated pond in Jefferson County, Texas from 6 July to 12 November 2001.
1:45 ANALYSIS OF SWIMMING BEHAVIOR BY GELATINOUS ZOOPLANKTON IN ALTERED GRAVITY CONDITIONS: CTENOPHORE AND CNIDARIAN MEDUSA
Craspedacusta sowerbii, the only species of freshwater cnidarian exhibiting a medusa stage in it's life cycle, was collected from an excavated pond in Jefferson County, Texas from 6 July to 12 November 2001.
The Trubchyn Fm marks slight deepening, but is still rather shallow, as testified by the Stegorhynchella pseudobidentata brachiopod community (BA 2) and the Lophiostroma schmidti and Endophyllum commodus cnidarian communities (both BA 2-3).