1Master of Ceremonies.chairperson, chairman, chairwoman, president, convener, spokesperson, spokesman, spokeswoman, leader, mc, master of ceremonies, mistress of ceremoniesView synonyms
2(in the US) Member of Congress.
3(in an astrological chart) the midheaven.
4(in the UK) Military Cross.
5Music cassette (of prerecorded audiotape)
Megacycle(s), a unit of frequency equal to one million cycles.