Fetus

/ˈfiːtəs/

Meaning & Definition

noun

An unborn offspring in the process of development, specifically after the end of the embryonic stage, typically from the eighth week after fertilization until birth.

The doctor explained that the fetus is developing rapidly in the mother's womb.

A human fetus is categorized as such from approximately the eighth week of gestation until birth.

Ultrasound images can provide a glimpse of the fetus's features during the second trimester.

In general biological terms, it refers to the developing young of other vertebrates that follow the embryonic stage.

The researcher studied the growth patterns of the fetus in various species of mammals.

The term is also applicable to the early forms of non-human vertebrates post-embryonic development.

The scientist documented the stages of the fish fetus's development in a controlled environment.

Etymology

From Latin 'fetus', meaning 'offspring, hatching, the product of the womb'.

Common Phrases and Expressions

fetal development

The process of growth and maturation of the fetus inside the womb.

fetus in fetu

A rare condition in which a malformed extra fetus develops within the body of its twin.

fetal heartbeat

The sound of the heart of a fetus, often checked during pregnancy.

Related Words

embryo

An early stage of development in multicellular organisms, prior to the fetal stage.

gestation

The period of development of a fetus in the womb from conception to birth.

pregnancy

The state of carrying a developing fetus within the female body.

Slang Meanings

Bun in the oven

She has a bun in the oven, she's expecting a baby soon.

Little bean

They are calling their fetus the little bean until the baby arrives.