pros·​the·​sis | \ präs-ˈthē-səs How to pronounce prosthesis (audio) , ˈpräs-thə- \
plural prostheses\ präs-​ˈthē-​ˌsēz How to pronounce prosthesis (audio) , ˈpräs-​thə-​ \

Definition of prosthesis

: an artificial device to replace or augment a missing or impaired part of the body

Examples of prosthesis in a Sentence

She was fitted with a prosthesis to replace her missing leg.
Recent Examples on the Web According to the sheriff's office, which publicly shared this story on Facebook: The prosthesis belongs to Brandon Smith, who lost it Sunday while swimming with his 6-year-old son. Frank Witsil, Detroit Free Press, 14 July 2022 One day in the third grade, after the family had returned to Connecticut, Sojitra’s prosthesis buckled beneath him. Alison Van Houten, Outside Online, 24 Apr. 2020 Above-the-knee amputees can go for a prosthesis with a bionic knee joint that allows for a more familiar up-and-down running action, or one that creates a straight leg from hip to blade and requires a roundhouse stride. Tim Heming, Outside Online, 10 Sep. 2021 To be exact, the prosthesis costs between $10,000 to $20,000. Sarah Wells, Popular Mechanics, 28 Apr. 2022 The prosthesis caught the attention of Joseph Dunn, an upper-limb amputee from Pennsylvania. Margaret Osborne, Smithsonian Magazine, 2 May 2022 This surgical procedure creates a small hole between the trachea and esophagus, where a prosthesis can be inserted to allow air from your lungs to vibrate muscles in your throat to create speech. Michelle Cohan, CNN, 22 Mar. 2022 And the one who’s ultimately chosen, played by Perez, wears a prosthesis, which simply amounts to a costume. Peter Lehman, Chron, 18 Mar. 2022 Hayley Arceneaux — a 29-year-old St. Jude physician assistant who became the youngest American, first pediatric cancer survivor and first person with a prosthesis to orbit Earth — saw the opportunity as a profound gift. Nick Maslow,, 24 Sep. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prosthesis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of prosthesis

circa 1900, in the meaning defined above

History and Etymology for prosthesis

New Latin, from Greek, addition, from prostithenai to add to, from pros- in addition to + tithenai to put — more at pros-, do

Learn More About prosthesis

Time Traveler for prosthesis

Time Traveler

The first known use of prosthesis was circa 1900

See more words from the same year

Dictionary Entries Near prosthesis




See More Nearby Entries 

Statistics for prosthesis

Last Updated

25 Jul 2022

Cite this Entry

“Prosthesis.” Dictionary, Merriam-Webster, Accessed 16 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for prosthesis


pros·​the·​sis | \ präs-ˈthē-səs, ˈpräs-thə- How to pronounce prosthesis (audio) \
plural prostheses\ -​ˌsēz How to pronounce prosthesis (audio) \

Medical Definition of prosthesis

: an artificial device to replace or augment a missing or impaired part of the body a dental prosthesis silicone breast and limb prostheses

More from Merriam-Webster on prosthesis

Nglish: Translation of prosthesis for Spanish Speakers

Britannica English: Translation of prosthesis for Arabic Speakers Encyclopedia article about prosthesis


Test Your Vocabulary

Challenging Words You Should Know

  • hedgehog reading a book
  • Often used to describe “the march of time,” what does inexorable mean?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!