WordNet (r) 3.0 (2006):

mV
    n 1: a unit of potential equal to one thousandth of a volt [syn:
         millivolt, mV]
    2: a radioactive transuranic element synthesized by bombarding
       einsteinium with alpha particles (Md is the current symbol
       for mendelevium but Mv was formerly the symbol) [syn:
       mendelevium, Md, Mv, atomic number 101]

The Free On-line Dictionary of Computing (30 December 2018):

mv

   1. operating system The Unix command to move or rename files
   or directories.

   2.  The country code for Maldives.

   (2014-11-27)