1. plural of millidegree; units of angular measurement equal to one thousandth of a degree
Usage: technical; used in precision measurement, engineering, and scientific contexts

Examples

• The telescope's pointing accuracy was within 50 millidegrees.
• Engineers adjusted the alignment to within 10 millidegrees of the target angle.
• The sensor could detect temperature variations of 0.1 millidegrees Celsius.
• Precision instruments in the laboratory measure angles in millidegrees.
• The satellite's orientation was corrected by several millidegrees.