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.
It contains a ectosarc and an endosarc as well as an outer membrane known as the cuticle.