check bit
n 1: (computer science) a bit that is used in an error detection
procedure in which a 0 or 1 is added to each group of bits
so that it will have either an odd number of 1's or an even
number of 1's; e.g., if the parity is odd then any group of
bits that arrives with an even number of 1's must contain
an error [syn: {parity bit}, {parity}, {check bit}]