English Reference
adjective

fetal

adj.
US /ˈfitəɫ/ fe·tal UK spelling foetal

  1. 01 B2 Upper Intermediate Technical Medicine

    relating to a baby that is still growing inside its mother.

    pertaining to or connected with a fetus during its development in the womb.

    Simple

    The doctor monitored the fetal heartbeat during the routine checkup.

    In context

    Advanced imaging techniques allow specialists to monitor fetal development with extraordinary precision throughout the second trimester.

    Usage

    Usually placed before the noun.

  2. 02 B2 Upper Intermediate Informal

    describing a way of lying down with your knees pulled up to your chest.

    denoting a physical posture characterized by a curled torso and limbs drawn toward the chest, resembling a fetus.

    Simple

    He fell asleep in a fetal position on the sofa.

    In context

    After the exhausting marathon, she collapsed onto the grass in a fetal position to recover her breath.

    Usage

    Almost always used in the phrase 'fetal position'.

    curled uphunched

Tissue resident macrophages are unusually long-lived cells that settle into organs during fetal development.

ScienceDaily· 3 Sept 2026

From fetus + -al.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated