in vi·​tro | \in-ˈvē-(ˌ)trō, -ˈvi-, -ˈwē- \

Definition of in vitro 

: outside the living body and in an artificial environment

Examples of in vitro in a Sentence

Recent Examples on the Web

Other studies have been done in lab animals, or in vitro (meaning in a test tube, using animal brain tissue). Dan Nosowitz, Vox, "The super-popular cannabis compound, explained.," 1 Nov. 2018 In 2008, after years of struggling with infertility, including 13 failed in vitro treatments and numerous failed adoption attempts, Vardalos and Gomez finally matched with a 3-year-old girl, their daughter Ilaria, People reports. Eileen Reslen, Good Housekeeping, "'My Big Fat Greek Wedding' Star Nia Vardalos Files for Divorce From Husband of 25 Years," 5 July 2018 Over 50,000 babies were born last year with the help of in vitro fertilisation (IVF)—5% of all births. The Economist, "No country resorts to IVF more than Japan—or has less success," 24 May 2018 To follow up this discovery Dr Haussler created what are known as organoids (specifically, brainoids), which are in vitro replicas of developing brains, made in this case using mouse cells. The Economist, "A history of big-headedness," 31 May 2018 If a drug passes initial screening tests in vitro, researchers next test it in vivo in live animals to determine the effects of a new drug on a whole system instead of just one cell type at a time. Smithsonian, "How Putting Organs on Chips Could Revolutionize Medicine," 31 May 2018 These tanks contain embryos and sperm collected from patients at Fertility Unlimited, an in vitro fertility clinic in Akron. Ginger Christ And Julie Washington, cleveland.com, "Tours of Ohio fertility clinics show procedures in place to safeguard eggs, embryos (photos, videos)," 25 Mar. 2018 Ol Pejeta noted that a copy of Sudan’s genetic material was taken on the day of his death, providing hope for future efforts to bring the species back from the brink of extinction through in vitro fertilisation (IVF) techniques. Paul Richardson, Houston Chronicle, "World's Last Male Northern White Rhino Dies in Kenyan Reserve," 20 Mar. 2018 The in vitro process would be conducted using sperm from dead rhinos that is stored in Berlin and eggs extracted by surgery from the females at Ol Pejeta, according to the conservancy. Washington Post, "Last male northern white rhino takes a walk despite illness," 3 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'in vitro.' 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 in vitro

circa 1894, in the meaning defined above

History and Etymology for in vitro

New Latin, literally, in glass

Keep scrolling for more

Learn More about in vitro

Statistics for in vitro

Last Updated

17 Nov 2018

Look-up Popularity

Time Traveler for in vitro

The first known use of in vitro was circa 1894

See more words from the same year

Keep scrolling for more

More Definitions for in vitro

in vitro

adjective

English Language Learners Definition of in vitro

: outside the body

in vi·​tro | \in-ˈvē-(ˌ)trō, -ˈvi- \

Medical Definition of in vitro 

: outside the living body and in an artificial environment growth of cells in vitro in vitro studies

More from Merriam-Webster on in vitro

Britannica English: Translation of in vitro for Arabic Speakers

Comments on in vitro

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

WORD OF THE DAY

a nest or breeding place

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

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