- the semipermeable membrane enclosing the cytoplasm of a cell.
Origin of cell membrane
First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cell membrane
Meanwhile great advances had been made also in the knowledge of the mature framework of cell-membrane in plants.
Both cilia and flagella spring directly from the cell-protoplasm, piercing the cell-membrane, when this is present.
By the segmentation of the fertilized egg, now invested by cell-membrane, the embryo-plant arises.
We may also obtain cells with cytoplasm filling the whole of the cellular cavity or separated from the cell-membrane.The Mechanism of Life
The researches of Salkowski (p. 113) leave little doubt, however, that the cell-membrane is of the cellulosic type.Researches on Cellulose
C. F. Cross
- a very thin membrane, composed of lipids and protein, that surrounds the cytoplasm of a cell and controls the passage of substances into and out of the cellAlso called: plasmalemma, plasma membrane
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- The semipermeable membrane that encloses the cytoplasm of a cell.cytomembrane plasmalemma plasma membrane
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- The thin membrane that forms the outer surface of the protoplasm of a cell and regulates the passage of materials in and out of the cell. It is made up of proteins and lipids and often contains molecular receptors. The membranes of organelles within the cell are made of the same basic material as the cell membrane. In plant cells, the cell membrane is surrounded by a rigid cell wall. Also called plasma membrane Compare cell wall. See more at cell.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.