The pattern, or structure, of the cell membrane; a flexible--or fluid--bilayer of phospholipid molecules interspersed with proteins. The 'mosaic' part refers to the proteins embedded in the phospholipid bilayer, which act as transport channels, receptors, or antigens.

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1. The pattern, or structure, of the cell membrane; a flexible--or fluid--bilayer of phospholipid molecules interspersed with proteins. The 'mosaic' part refers to the proteins embedded in the phospholipid bilayer, which act as transport channels, receptors, or antigens.