Greek-English translations for μηδέν

• zero
  President Obama's Global Zero vision in Prague was impressive and we welcomed it. Το όραμα "πυρηνικά στο μηδέν" (Global Zero) του προέδρου Obama στην Πράγα ήταν εντυπωσιακό και το επικροτήσαμε. "
  When it is really bad then it would be a zero TAC. Εκεί όπου είναι πραγματικά άσχημα, τότε το TAC θα ήταν μηδέν.
  The conductor waited until the passenger count was zero
• cipher
  a painters cipher, an engravers cipher, etc.
  The message was written in a simple cipher. Anyone could figure it out.
  The message is clearly a cipher, but I cant figure it out.