Definition of "endoplasm" []

• A central, less viscous portion of the cytoplasm that is distinguishable in certain cells, especially motile cells. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In this condition ectoplasm and endoplasm could be made out with the clearest definition."
• "Like the latter, there is one caudal bristle, but unlike it there is only one posterior contractile vacuole, while the endoplasm is filled with large granules or food balls."
• "The endoplasm usually, but not always, contains a bright red eye-spot."