Etymology
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eraser (n.)

"thing that erases writing," 1790, American English, agent noun from erase. Originally a knife for scraping off the ink. As a rubber product for removing pencil marks, from 1858.

updated on September 16, 2012

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Definitions of eraser from WordNet

eraser (n.)
an implement used to erase something;
From wordnet.princeton.edu, not affiliated with etymonline.