entrejambe

/ɑ̃tʁə.ʒɑ̃b/
1.
nounmasculineSing

crotch (the area between the legs)

Il a déchiré son pantalon à l'entrejambe.

He ripped his pants at the crotch.

2.
nounmasculineSing

inseam (the measurement from the crotch to the hem of a trouser leg)

Quelle est la longueur d'entrejambe de ce jean ?

What's the inseam of these jeans?