: an unborn or unhatched vertebrate especially after attaining the basic structural plan of its kind
specifically
: a developing human from usually two months after conception to birth compare embryo sense 1a
Examples of fetus in a Sentence
Recent Examples on the Web
Also counted were seven parents died, a school bus driver, a pharmacy technician from an adjacent clinic and the 6-month-old fetus Shahriyari had been carrying.
—
Zohreh Saberi, Los Angeles Times, 6 May 2026
Stem cells are the universal cells found in human fetuses that can turn into any kind of human cells as the baby body develops.
—Tereza Pultarova, Space.com, 3 May 2026
The probable cause affidavit noted that Rebecca's belly had been sliced open, but there was no sign of a baby or a fetus.
—Chris Spargo, PEOPLE, 1 May 2026
This is more likely to happen within the first year that a person is infected with syphilis, although the syphilis bacteria can spread to a fetus at any stage of infection, causing the unborn baby to develop what’s known as congenital syphilis.
—Casey Pinto, The Conversation, 1 May 2026
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Zohreh Saberi, Los Angeles Times, 6 May 2026
Stem cells are the universal cells found in human fetuses that can turn into any kind of human cells as the baby body develops.
—Tereza Pultarova, Space.com, 3 May 2026
The probable cause affidavit noted that Rebecca's belly had been sliced open, but there was no sign of a baby or a fetus.
—Chris Spargo, PEOPLE, 1 May 2026
This is more likely to happen within the first year that a person is infected with syphilis, although the syphilis bacteria can spread to a fetus at any stage of infection, causing the unborn baby to develop what’s known as congenital syphilis.
—Casey Pinto, The Conversation, 1 May 2026
See All Example Sentences for fetus
Cite this Entry
“Fetus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fetus. Accessed 8 May. 2026.
Copy CitationKids Definition
fetus
noun
fe·tus
ˈfēt-əs 
plural fetuses
: a young animal while in the body of its mother or in the egg especially in the later stages of development
especially
: a developing human being in the uterus from usually two months after pregnancy occurs to birth compare embryo sense 1
Medical Definition
fetus
noun
fe·tus
variants
or chiefly British foetus
plural fetuses or chiefly British foetuses or foeti
ˈfēt-ˌī
: an unborn or unhatched vertebrate especially after attaining the basic structural plan of its kind
specifically
: a developing human from usually two months after conception to birth compare embryo
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