noun
laser scalpel
A medical instrument that uses a laser beam for cutting tissue during surgery.
See also: メス
外科医はレーザーメスを使って腫瘍を切除した。
The surgeon removed the tumor using a laser scalpel.
メス is a general scalpel, while レーザーメス specifically uses a laser.
Loanword from English 'laser' + German 'Messer' (knife), via the Japanese abbreviation メス for scalpel.