'earpiece' definitions:

Definition of 'earpiece'

From: WordNet
noun
Electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear; "it was not the typing but the earphones that she disliked" [syn: earphone, earpiece, headphone, phone]

Definition of 'earpiece'

From: GCIDE
  • earpiece \earpiece\ n. a device for converting electric signals into sounds, designed to be held over or inserted into the ear; as, The common telephone handset has a speaker and an earpiece.
  • Syn: earphone, headphone, phone. [WordNet 1.5]