English version

razor blade

From Longman Dictionary of Contemporary Englishrazor bladeˈrazor blade noun [countable]  a small flat blade with a very sharp edge, used in a razor
Examples from the Corpus
razor bladeI now remembered that I had put a razor blade under the insole of my shoe, and I removed it.After removing the tape, pare away any surplus adhesive with a razor blade.Two guards were attacked with a razor blade and slightly injured.A razor blade or serrated knife will work well.He turned off the cold water, picked up the razor blade and sat on the floor next to the tub.A boy would have better opportunities - of doing that nasty trick with the razor blade, for example.
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