cell membrane


Definition of cell membrane 

: a membrane of a cell especially : plasma membrane

Examples of cell membrane in a Sentence

Recent Examples on the Web

While the research is mixed, oral and topical forms claim to protect skin-cell membranes from free-radical damage, while firming, smoothing and brightening the complexion. Allure, "The Skin-Care Glossary: A Comprehensive Guide to Everything You Need to Know," 17 Aug. 2018 The genes affected nearly every aspect of nerve function, like allowing ions to move across cell membranes, nerve cell metabolism, forming and maintaining connections among nerve cells, and more. John Timmer, Ars Technica, "The genetics of education: 1,271 genes account for 10% of the variation," 25 July 2018 Their cell membranes, for example, are made up of two different kinds of fatty molecules, known as lipids. Prachi Patel, Scientific American, "Engineered Microbe Shakes Up the Tree of Life," 13 July 2018 Larger, multicellular organisms—with multiple flagella—were better at sweeping water past their cell membranes to harvest oxygen. Elizabeth Pennisi, Science | AAAS, "The momentous transition to multicellular life may not have been so hard after all," 28 June 2018 Their cell membranes would be made of nitrogen, which could also enable them to survive frigid temperatures. John Wenz, Popular Mechanics, "Titan's Seas May Hide a Strange Form of Nitrogen-Based Life," 2 Mar. 2015 Along with GenX, the plant also makes Nafion, used in fuel-cell membranes. Ken Otterbourg, Fortune, "Teflon’s River of Fear," 24 May 2018 Weyand and her colleagues found that the abnormal T cells sprouted ruffles on their cell membranes that enabled them to penetrate deeper into tissues. Mitch Leslie, Science | AAAS, "To treat some diseases, researchers are putting immune cells on a diet," 29 Mar. 2018 Next, the sperm cell has to pick up speed to be able to fuse with the egg cell, and the sperm's cell membrane has to become more fluid. Carla Bleiker, USA TODAY, "NASA shoots human sperm into space," 12 Apr. 2018

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

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First Known Use of cell membrane

1840, in the meaning defined above

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Last Updated

21 Nov 2018

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Time Traveler for cell membrane

The first known use of cell membrane was in 1840

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More Definitions for cell membrane

cell membrane


Kids Definition of cell membrane

: the thin outside layer that surrounds the cytoplasm of a cell and controls the movement of materials into and out of the cell

cell membrane


Medical Definition of cell membrane 

: a membrane of a cell especially : plasma membrane

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a knickknack or trinket

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