endoplasmic reticulum

noun

: a system of interconnected vesicular and lamellar cytoplasmic membranes that functions especially in the transport of materials within the cell and that is studded with ribosomes in some places see cell illustration

Example Sentences

Recent Examples on the Web Changes in the code for one gene stood out: ERAP2, which encodes a protein called endoplasmic reticulum aminopeptidase 2. Byann Gibbons, science.org, 19 Oct. 2022 This could impact the size of the endoplasmic reticulum Golgi intermediate compartment. William A. Haseltine, Forbes, 3 Sep. 2021 The signal peptide sequence ferries signaling proteins to a port on the endoplasmic reticulum. William A. Haseltine, Forbes, 30 Aug. 2021 Among them was a gene called Immediate Early Response 3 Interacting Protein 1 in the endoplasmic reticulum, which is the protein processing station within a cell. Priyanka Runwal, STAT, 30 Oct. 2020 Some of those proteins stretch the endoplasmic reticulum, creating protective vesicles, or sacs. Mark Fischetti, Scientific American, 23 June 2020 Our cells have many compartments — lysosomes for breaking down food molecules, for example, and the endoplasmic reticulum for moving proteins around the cell. Carl Zimmer, STAT, 30 May 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'endoplasmic reticulum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of endoplasmic reticulum was in 1947

Dictionary Entries Near endoplasmic reticulum

Cite this Entry

“Endoplasmic reticulum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endoplasmic%20reticulum. Accessed 1 Dec. 2022.

Kids Definition

endoplasmic reticulum

noun

en·​do·​plas·​mic reticulum
ˌen-də-ˈplaz-mik-
: a system of cavities and tiny connecting canals that occupy much of the cytoplasm of the cell and functions especially in the movement of materials within the cell

Medical Definition

endoplasmic reticulum

noun

: a system of interconnected vesicular and lamellar cytoplasmic membranes that functions especially in the transport of materials within the cell and that is studded with ribosomes in some places see rough endoplasmic reticulum

More from Merriam-Webster on endoplasmic reticulum

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