c. 1600, from Latin erasus, past participle of eradere "scrape out, scrape off, shave; abolish, remove," from assimilated form of ex "out" (see ex-) + radere "to scrape" (possibly from an extended form of PIE root *red- "to scrape, scratch, gnaw"). Of magnetic tape, from 1945. Related: Erased; erasing.
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