Definitions

in vitro

[in vee-troh] / ɪn ˈvi troʊ /

ADJECTIVE

artificial

Synonyms

WEAK

artificial insemination outside the womb test-tube

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

However Geisbert said that during tests in his lab, remdesivir had "stronger in vitro data against Bundibugyo than it does for Zaire".

From Barron's • May 19, 2026

Right now, they are pursuing in vitro fertilization, which requires many doctor’s appointments.

From MarketWatch • May 13, 2026

Last March, at a Women’s History Month event, President Donald Trump highlighted his record on women’s health, including support for in vitro fertilization, saying he’ll one day be known as the “fertilization president.”

From Salon • Apr. 18, 2026

Because of these challenges, most past research has focused on tachyzoites grown in vitro, leaving the biology of cyst-dwelling bradyzoites largely unexplored.

From Science Daily • Jan. 27, 2026

When that didn’t work, he recommended we move to in vitro fertilization.

From "Becoming" by Michelle Obama