From Longman Dictionary of Contemporary Englishpotato peelerpoˈtato ˌpeeler noun [countable] DFUa small tool like a knife, used for removing the skin of a potato
Examples from the Corpus
potato peeler• Peel maincrop potatoes thinly, preferably using a potato peeler.• Shred one medium carrot into ribbon strips with a potato peeler, repeat with one medium courgette.• Most can still afford a new potato peeler or washing up bowl if some one bothers to deliver them. 