Modified Condition Decision Coverage (MCDC) definition in Computer Security terms:
Definition(s): This is a strong coverage criterion that is required by the US Federal Aviation Administration for Level A (catastrophic failure consequence) software; i.e., software whose failure could lead to complete loss of life. It requires that every condition in a decision in the program has taken on all possible outcomes at least once, and each condition has been shown to independently affect the decision outcome, and that each entry and exit point have been invoked at least once.
Source(s): NIST SP 800-142
reference: CSRC Glossary