Google

Previoustwo-to-the-N Up= U = NextUBD

u- pref.

Written shorthand for micro-; techspeak when applied to metric units, jargon when used otherwise. Derived from the Greek letter "mu", the first letter of "micro" (and which letter looks a lot like the English letter "u").

Previoustwo-to-the-N Up= U = NextUBD