megacycle

1. Hightower: We did two global routes in one megacycle!
   我们在一兆周内造了两条环球线路！
2. An acoustic-emission pulse contains a very wide range of frequency components, extending up into the megacycle range.
   声发射脉冲就包含一个很宽的频率组成范围，可扩展到兆赫。

noun

1. one million periods per second

   Synonym:    megahertzMHzmegacycle per secondMc