A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... can have several shades of meaning. At its simplest, it refers to an adherent of a monarch or royal family. Of the more specific uses of the term, the most commo ...