Meaning of prosthesis

pros•the•sis

Pronunciation: (pros-thē'sis for 1 pros'th&schwa-sis for 2), [key]
— pl. -ses
  1. a device, either external or implanted, that substitutes for or supplements a missing or defective part of the body.
  2. the addition of one or more sounds or syllables to a word or line of verse, esp. at the beginning.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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