DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   millisievert /mˈɪlɪsˌɪvɜːt/ (mSv /ˈɛm ˌɛsvˈiː/)
   Millisievert <neut>mSv,  /ˈɛm ˌɛsvˈiː/
         "four millisievert per year"  - vier Millisievert pro Jahr
    see: sievert