endoplasmic reticulum

endoplasmic reticulum definition - medical

endoplasmic reticulum

noun Abbr. ER
The membrane network in cytoplasm that is composed of tubules or cisternae. Some membranes carry ribosomes on their surfaces while others are smooth.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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