in vivo

American  

[in vee-voh] / ɪn ˈvi voʊ /

adverb

1. (of a biological process) occurring or made to occur within a living organism or natural setting.

---

in vivo British  

/ ɪn ˈviːvəʊ /

adverb

1. (of biological processes or experiments) occurring or carried out in the living organism

---

in vivo Scientific  

/ ĭnvē′vō /

1. Inside a living organism.

2. Compare in vitro

---

in vivo Cultural  

1. In nature; literally, “in life.” In vivo conditions are distinguished from those that might exist only in a laboratory. (Compare in vitro.)

---

Etymology

Origin of in vivo

First recorded in 1900–05; from Latin in vīvō “in (something) alive”

---

Compare meaning

How does in-vivo compare to similar and commonly confused words? Explore the most common comparisons:

• in vivo vs. in vitro

---

Example Sentences

See Examples For:

in vivo

Producing engineered immune cells directly inside the body, an approach known as in vivo manufacturing, could potentially remove the need for this preparatory chemotherapy as well.

From Science Daily ● Oct. 7, 2026

The researchers also tested the technique in vivo using transgenic mice engineered to express the human PCSK9 gene.

From Science Daily ● Sep. 10, 2026

The collaboration comes with the incentive of expanding the application of Sail’s in vivo CAR-T platform across additional therapeutic targets over time.

From The Wall Street Journal ● Jul. 29, 2026

Rather, the surge came on the heels of company’s investor day, where perhaps the most surprising announcement was Moderna’s first in vivo CAR-T program.

From Barron's ● Jun. 26, 2026

In this case then the condition of the blood in vivo is satisfactorily explained by the absence of function of bone-marrow.

From Histology of the Blood Normal and Pathological by W. Myers

Random Word

Spin the wheel and learn a new word!

---