Dictionary
endoplas'mic retic'ulum
Cell Biol.
a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface
(smooth endoplasmic reticulum) or studded with ribosomes
(rough endoplasmic reticulum), involved in the transport of materials. See illus. under
cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.