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

  • n. The ectoplasm of certain protozoans, such as the amoeba.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The ectoplasm of an amoeba and similar protozoa

from the GNU version of the Collaborative International Dictionary of English

  • n. The semisolid external layer of protoplasm in some unicellular organisms, as the amœba; ectoplasm; exoplasm.

from The Century Dictionary and Cyclopedia

  • n. The ectoplasm of a protozoan; the exterior substance of the body of an animal of low organization, as an amœba or other rhizopod or protozoan, in any way distinguished from an endosarc; the usually thicker, denser, tougher, or otherwise modified protoplasm which forms an envelop of the body, as differentiated from the interior substance or contents.


ecto- + Greek sarx, sarc-, flesh.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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