/ Dictionary / Index E endoplasmic reticulum: Meaning and Definition of Find definitions for: endoplas'mic retic'ulum Pronunciation: [key] — Cell Biol. Cell Biol. a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surfaceor studded with ribosomesinvolved in the transport of materials. See illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. endoplasm endopodite Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language