Definition of X-Acto™ noun from the Oxford Advanced Learner's Dictionary

 

X-Acto™

 noun
noun
BrE
 
; NAmE
 
(pl. X-Actos)
 
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a US make of knife with thin steel blades which can be changed. It is used for delicate work, e.g. by artists to cut paper accurately and by people building model aircraft.