Plain English Meaning
A defined list of health problems that, by regulation, automatically stop the FAA from issuing a pilot medical certificate through normal channels. If an applicant has one of these, the standard answer is no -- though a special review process may still allow them to fly.
Full Definition
A specific list of medical conditions identified in 14 CFR Part 67 that prevent the FAA from issuing a medical certificate to a pilot applicant under standard procedures. The conditions currently include angina pectoris, bipolar disease, cardiac valve replacement, coronary heart disease that has been treated or is symptomatic, diabetes mellitus requiring insulin or other medications, without medical , , , , , enough to have repeatedly manifested itself by overt acts, , , , and transient of nervous functions without satisfactory medical explanation.