in vitro
adverb or adjective
in vi·tro
in-ˈvē-(ˌ)trō 
-ˈvi-
-ˈvi-
-ˈwē-
: outside the living body and in an artificial environment
Examples of in vitro in a Sentence
Recent Examples on the Web
The campaign mischaracterizes facts about same-sex parenting through California cases designed to maximize outrage, while specifically targeting in vitro fertilization and surrogacy as purported gateways to promoting LGBTQ+ families.
—
Los Angeles Times, 6 Feb. 2026
More than half a century ago, two breakthroughs reshaped ideas about what was biologically and physically possible, the study notes, in reference to the first human landing on the moon and the first successful fertilization of a human egg outside the body through in vitro fertilisation, or IVF.
—Sharmila Kuthunur, Space.com, 4 Feb. 2026
The couple then decided to switch from IUI to in vitro fertilization.
—David Chiu, PEOPLE, 31 Jan. 2026
The Liu children were conceived via in vitro fertilization and born to surrogate mothers.
—Scott M. Reid, Oc Register, 26 Jan. 2026
See All Example Sentences for in vitro
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Los Angeles Times, 6 Feb. 2026
More than half a century ago, two breakthroughs reshaped ideas about what was biologically and physically possible, the study notes, in reference to the first human landing on the moon and the first successful fertilization of a human egg outside the body through in vitro fertilisation, or IVF.
—Sharmila Kuthunur, Space.com, 4 Feb. 2026
The couple then decided to switch from IUI to in vitro fertilization.
—David Chiu, PEOPLE, 31 Jan. 2026
The Liu children were conceived via in vitro fertilization and born to surrogate mothers.
—Scott M. Reid, Oc Register, 26 Jan. 2026
See All Example Sentences for in vitro
Cite this Entry
“In vitro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20vitro. Accessed 7 Feb. 2026.
Copy CitationKids Definition
in vitro
adverb or adjective
in vi·tro
in-ˈvē-(ˌ)trō
: outside the living body and in an artificial environment
an egg fertilized in vitro
Etymology
Latin, literally, "in glass"
Medical Definition
in vitro
adverb or adjective
in vi·tro
in-ˈvē-(ˌ)trō
-ˈvi-
-ˈvi-
: outside the living body and in an artificial environment
growth of cells in vitro
in vitro studies
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