sleepsuit
US /ˈsliːp.suːt/
UK /ˈsliːp.suːt/

1.
grenouillère, pyjama bébé
a one-piece garment for a baby, typically covering the whole body including the feet, worn for sleeping
:
•
She dressed the baby in a soft cotton sleepsuit before putting him to bed.
Elle a habillé le bébé d'une grenouillère en coton doux avant de le coucher.
•
The baby looked adorable in his new striped sleepsuit.
Le bébé était adorable dans sa nouvelle grenouillère rayée.