from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A stinging or grasping organ in the outer cytoplasm of certain protozoans, especially ciliates, consisting of a threadlike or bristlelike filament that can be discharged suddenly from a minute capsule.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A threadlike organ in certain protozoans that can be discharged suddenly in order to grasp or sting

from the GNU version of the Collaborative International Dictionary of English

  • n. A lasso cell.

from The Century Dictionary and Cyclopedia

  • n. A hair-cell; one of the minute rod-like or hair-like bodies developed in the subcuticular layer of many infusorians: so named by G. J. Allman in 1855. They represent or resemble the cnidæ or threadcells of cœlenterates.


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