grater -
A tool with which one grates, especially cheese, to facilitate getting small particles or shreds off a solid lump.
Wikipedia
A grater (also known as a shredder in parts of the eastern United States) is a kitchen utensil used to grate foods into fine pieces. It was invented by François Boullier in the 1540s.
OmegaWiki Dictionary
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grater A kitchen implement used to cut food products (such as cheese and carrots) into small strips.