[ en-duh-plaz-uh m ]
/ ˈɛn dəˌplæz əm /

noun Cell Biology.

the inner portion of the cytoplasm of a cell.Compare ectoplasm(def 1).

Origin of endoplasm

First recorded in 1880–85; endo- + -plasm

Related forms

en·do·plas·mic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for endoplasmic


/ (ˈɛndəʊˌplæzəm) /


cytology the inner cytoplasm in some cells, esp protozoa, which is more granular and fluid than the outer cytoplasmSee ectoplasm (def. 1)

Derived Forms

endoplasmic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for endoplasmic


[ ĕndə-plăz′əm ]


A central, less viscous portion of the cytoplasm that is distinguishable in certain cells, especially motile cells and protozoa.

Related forms

en′do•plasmic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.