nematocyst


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Related to nematocyst: basal disc

nem·a·to·cyst

 (nĕm′ə-tə-sĭst′, nĭ-măt′ə-)
n.
A capsule within specialized cells in the tentacles of cnidarians, such as jellyfish and corals, containing a barbed, threadlike tube that delivers a toxic sting to predators and prey.

nem′a·to·cys′tic adj.

nematocyst

(ˈnɛmətəˌsɪst; nɪˈmætə-)
n
(Zoology) a structure in coelenterates, such as jellyfish, consisting of a capsule containing a hollow coiled thread that can be everted to sting or paralyse prey and enemies
ˌnematoˈcystic adj

nem•a•to•cyst

(ˈnɛm ə təˌsɪst, nɪˈmæt ə-)

n.
one of the tiny organs in jellyfish and other coelenterates that uncoils a threadlike poisonous stinger when irritated.
[1870–75]
nem`a•to•cys′tic, adj.

nem·a·to·cyst

(nĕm′ə-tə-sĭst′, nĭ-măt′ə-sĭst′)
One of the stinging cells in the tentacles of a jellyfish, hydra, or related animal, used to capture prey and ward off attackers.
References in periodicals archive ?
Interspecific mucus enhanced nematocyst discharge by 44% and spirocyst discharge by 90%, as compared to baseline discharge obtained in seawater alone.
Several studies on [PLA.sub.2] from venom sources such as rattlesnake, Crotalus durissus cascavella, venom [15] and sea anemone, Aiptasia pallid, nematocyst venom [29] also showed strict [Ca.sup.2+] requirement [30].
Purification and partial characterization of the phospholipase A2 and co-lytic factor from sea anemone (Aiptasia pallida) nematocyst venom.
Keywords: Envenomation, Jellyfish, Nematocyst, Treatment, Turkey
Alderslade, "Partial purification of box jellyfish (Chironex fleckeri) nematocyst venom isolated at the beachside," Toxicon, vol.
Severity of Irukandji syndrome and nematocyst identification from skin scrapings.
Tentacles have intermittent ridges of nematocyst batteries within the epidermis.
These analyzed specimens of Gonionemus have: around a 10 mm width, four radial channels, a manubrium shorter than the umbrella cavity, a mouth with four lips slightly crenulated, four folded gonads along radial channels leaving the distal part free, between 40 and 44 hollow tentacles, each tentacle has ring-like nematocyst clusters and adhesive pads near the distal end, and one or two statocysts between successive tentacles enclosed in mesoglea near ring canal with a single endodermal club.
A simplified identification key, redescriptions, illustrations and data on nematocyst compliment are provided for each species.
We thus estimated the relative tentacle length by counting the number of stenoteles (a type of nematocyst) throughout a tentacle.
A final visit to the Jawbone on 4 August 2012, in poor weather, yielded a 12 mm juvenile specimen, which was used for live nematocyst observations.