block check character
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block check character[′bläk ¦chek ‚kar·ik·tər]
A character that is added to a block of data to check its accuracy, and consists of parity bits each of which is set by observing a specified set of bits in the block.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.