socket

sock·et

noun \ˈsäk-ət\

Definition of SOCKET

: an opening or hollow that forms a holder for something: as a : any of various hollows in body structures in which some other part normally lodges <the bony socket of the eye> <an inflamed tooth socket>; especially : the depression in a bone with which the rounded head of another bone fits in a ball-and-socket joint b : a cavity terminating an artificial limb into which the bodily stump fits—see suction socket