spirocyst

spirocyst: n. [L. spira, coil; Gr. kystis, bladder]

(CNIDARIA: Anthozoa)

In Zoantharia, a type of nematocyst with a thin, single- wall capsule that is acidophilic and contains a long, spirally coiled, unarmed thread of uniform diameter; see nematocyst.

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Cnidocyte — Not to be confused with Pneumatocyst. Nomarski micrograph of a Ruthenium red stained nematocyst from Aiptasia pallida, the pale anemone. The red dye stains the polyanionic venom proteins found inside the capsule of this partially discharged… … Wikipedia
cnida — n. [Gr. nema, thread; kystis, bladder] (CNIDARIA) Intracellular organelles that function in defense and capture of prey by injecting a toxin; in hydras, they function in adhesion to the bottom; also called stinging cells, nettle cells, or thread… … Dictionary of invertebrate zoology

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