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saser

British  
/ ˈseɪzə /

noun

  1. a device for amplifying ultrasound, working on a similar principle to a laser

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of saser

C20: s ( ound ) a ( mplification by ) s ( timulated ) e ( mission ) of r ( adiation )