- 1. a symbol for "billion cubic microns per square inch," a unit used in flexographic printing. In this process, a roller engraved with a large number of tiny cells is used to transfer ink to the printing plate. The unit measures the total volume of these cells per unit area of the roller. One billion (109) cubic microns per square inch is the same as one cubic millimeter per square inch (mm3/in2) or one microliter per square inch (µL/in2). The appropriate SI unit for this volume per area measure is the micrometer or micron (µm); 1 bcm is equal to 1.5500 µm.2. abbreviation for "bank cubic meter"
Dictionary of units of measurement. 2015.