Source : Webster's Revised Unabridged Dictionary (1913)

Sterilizer \Ster"il*i`zer\, n.
   One that sterilizes anything; specif., an apparatus for
   sterilizing an organic fluid or mixture.

Source : WordNet®

sterilizer
     n : a device for heating substances above their boiling point;
         used to manufacture chemicals or to sterilize surgical
         instruments [syn: {autoclave}, {steriliser}]