micro

By default the "%c" format specifier for scientific notation used to generate axis tick labels uses a lower case u as a prefix to indicate "micro" (10^-6). The set micro command tells gnuplot to use a different typographic character (unicode U+00B5). The byte sequence used to represent this character depends on the current encoding. See format specifiers, encoding.

If the current encoding default is not satisfactory, you can provide a character string that generates the desired representation. This is mostly useful for latex terminals, for example

     set micro "{\textmu}"