noun (n)

• a unit of potential equal to one thousandth of a volt(noun.quantity)

  Synonym:
  millivolt
  

  source: wordnet30
• a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)(noun.substance)

  Synonym:
  atomic number 101, md, mendelevium
  

  source: wordnet30