vit·​re·​ous | \ ˈvi-trē-əs How to pronounce vitreous (audio) \

Definition of vitreous

 (Entry 1 of 2)

1a : resembling glass (as in color, composition, brittleness, or luster) : glassy vitreous rocks
b : characterized by low porosity and usually translucence due to the presence of a glassy phase vitreous china
2 : of, relating to, derived from, or consisting of glass
3 : of, relating to, or constituting the vitreous humor vitreous surgery



Definition of vitreous (Entry 2 of 2)

Examples of vitreous in a Sentence

Recent Examples on the Web: Adjective And the microneedles were nearly invisible since HA is largely transparent—almost exactly as transparent as the cornea and vitreous fluid in the eye, in fact. Kiona N. Smith, Ars Technica, "Delivering drugs directly to the eye using microneedles that dissolve," 9 Nov. 2018 An apartment on the 85th floor of One57, the vitreous skyscraper in Midtown, sold for $53.97 million. Vivian Marino, New York Times, "Penthouse Sale in Chelsea Sets Downtown Record," 1 June 2018 Earlier this week, doctors in Tampa found and removed a pork tapeworm that nestled into the vitreous chamber of a man’s eye. Jason Daley, Smithsonian, "Woman Infected by Parasitic Cattle Eye Worm," 14 Feb. 2018 The corners draw samples of blood, urine, bile and vitreous from the eyes of the deceased. Kimberly Fornek,, "Hinsdale South students experience trip to DuPage morgue," 25 Jan. 2018 Packages of toes, bones, vomit, and vitreous fluid from a victim’s eyeball aren’t uncommon. Sam Wood,, "Toes, bones and tissue offer a window on opioid epidemic at NMS Labs in Willow Grove," 7 Sep. 2017 Until the autopsy is performed, and samples of blood, urine and vitreous fluid from the eyeball are sent by FedEx to a laboratory in Indiana, the official cause of death remains unknown. Mike Clary,, "Rising OD deaths create backlog in South Florida morgues," 24 Aug. 2017 For the autopsy, examiners ordered three toxicology tests on Craig — blood, urine and vitreous fluid of the eye. John Branch, New York Times, "Behind Kevin Durant’s Jersey Number, a Cold-Blooded Murder," 7 Apr. 2017

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

See More

First Known Use of vitreous


14th century, in the meaning defined at sense 1a


1869, in the meaning defined above

History and Etymology for vitreous


Middle English, from Latin, from vitrum glass

Keep scrolling for more

Learn More about vitreous

Time Traveler for vitreous

Time Traveler

The first known use of vitreous was in the 14th century

See more words from the same century

Statistics for vitreous

Cite this Entry

“Vitreous.” The Dictionary, Merriam-Webster Inc., Accessed 22 January 2020.

Keep scrolling for more

More Definitions for vitreous


vit·​re·​ous | \ ˈvi-trē-əs How to pronounce vitreous (audio) \

Medical Definition of vitreous

 (Entry 1 of 2)

: of, relating to, constituting, or affecting the vitreous body vitreous hemorrhages



Medical Definition of vitreous (Entry 2 of 2)

More from Merriam-Webster on vitreous

Spanish Central: Translation of vitreous

Nglish: Translation of vitreous for Spanish Speakers

Comments on vitreous

What made you want to look up vitreous? Please tell us where you read or heard it (including the quote, if possible).


to help to grow, develop, or succeed

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman tablet
  • What did focus mean in Latin?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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