constant-velocity joint

or con·stant ve·loc·i·ty joint

[ kon-stuh nt vuh-los-i-tee ]
/ ˈkɒn stənt vəˈlɒs ɪ ti /

noun Automotive.

a universal joint that is used in the drive train of front-wheel-drive cars and operates effectively even when the shafts being connected meet at a sharp angle.