Nematocyst definition

nĕmə-tə-sĭst, nĭ-mătə-
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.
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Any of the intracellular stinging structures characteristic of all cnidarians, as the jellyfish: it contains a threadlike sting.
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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.
noun
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One of the minute capsules in the tentacles of cnidarians, such as jellyfish, hydras, or sea anemones, used for stinging. The capsule is produced by a special cell (called a cnidoblast) and contains a tightly coiled barbed thread that quickly shoots forth if the capsule's lid is disturbed. The thread often contains poison.
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(biology) A capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting.
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Other Word Forms

Noun

Singular:
nematocyst
Plural:
nematocysts

Origin of nematocyst

  • Formed as nemato- +"Ž cyst after the French nématocyste.

    From Wiktionary