One of the mysteries of the English language finally explained.
A utility knife with a very sharp replaceable blade.‘my T-square, my X-acto knife, my blue pencil’
- ‘Use an X-acto knife to cut an X in the center opening, and fold excess fabric into the back of the plate.’
- ‘I'm guessing it should be possible to disable the serial number by cutting the CLK line to the EEPROM, which should be easy for anyone with a keen eye and a sharp X-acto knife.’
- ‘Many of the paintings incorporate cut paper and other materials which Schwarz manipulated with a variety of tools, including protractors and X-acto knives.’
- ‘On the first one he drew the uppermost layer of a crack and cut it out with an X-acto knife.’
1940s: respelling of the adjective exact + -o.
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