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

  • n. The larval stage of many tapeworms, consisting of a single invaginated scolex enclosed in a fluid-filled cyst.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The larval stage of any of several tapeworms, having a fluid-filled cyst enclosing a scolex.

from The Century Dictionary and Cyclopedia

  • n. A cystic worm or bladder-worm; a hydatid; an encysted scolex or tænia-head; the encysted state of the larva of a tapeworm.


New Latin : Greek kustis, bladder; see cyst + Greek kerkos, tail.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek κύστις (kustis, "bladder") + κέρκος (kerkos, "tail"). (Wiktionary)



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