n.Radio, production of 'beats' by superimposition of oscillations of slightly different frequency upon the waves being received; use of this 'beat' frequency in radio reception; interference, especially whistle, due to heterodyne; v.i. produce heterodyne; cause interference thus. s.
Green represents agriculture. Red recalls the struggle for independence. Black stands for the Zambian people. Orange symbolizes Zambia's mineral wealth, particularly the major deposits of copper. Effective date: 24 October 1964.