earplug

Noun
  1. An earphone that is inserted into the ear canal (synset 103266951)
    is a type of: earphone, earpiece, headphone, phone - electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear
  2. A plug of cotton, wax, or rubber that is fitted into the ear canal for protection against the entry of water or loud noise (synset 103266775)
    is a type of: plug, stopper, stopple - blockage consisting of an object designed to fill a hole tightly

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