noun🔗Share无偏线, 零偏线. A line on a chart or map joining points of zero magnetic declination."The map showed the agonic line, marking the area where compasses point true north. "地图上标出了无偏线，这条线标示着指南针指向正北方的区域。geographygeologynauticalsciencephysicsChat with AIVocabulary GamePractice Reading
