(computing) A command that exports a carry (bit or digit that is carried in an addition operation) from the current column of an addition operation.
2004, Wayne Wolf, FPGA-Based System Design:
A simpler scheme is to connect the carry-ins and carry-outs of the units in a ripple chain. This approach is most common in chip design because the wiring for the carry-lookahead tree is hard to design and area-consuming.