Extrusome

Extrusomes are membrane-bound structures in some eukaryotes which, under certain conditions, discharge their contents outside the cell. There are a variety of different types, probably not homologous, and serving various functions. Notable extrusomes include mucocysts, which discharge a mucous mass sometimes used in cyst formation, and trichocysts...
Found on http://en.wikipedia.org/wiki/Extrusome

extrusome

(from the article `protozoan`) ...into fragments and enclosed in digestive vacuoles. Predatory ciliates such as Didinium nasutum, Lacyrmaria olor, and Dileptus anser apprehend ... ...bodies are often present, and pigment bodies apart from, or in addition to, chloroplasts are found in some species. In the cortex, just under the ... [2...
Found on http://www.britannica.com/eb/a-z/e/62

extrusome

A kind of organelle, the contents of which can be extruded, for example to catch or kill prey or for protection.
Found on http://tolweb.org/tree/home.pages/glossary.html
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