ball, socket – On a clothing snap, there is a ball and a socket. More…
socket – From Middle English, first as “head of a spear, resembling a plowshare,” from an Anglo-Norman French diminutive of French soc, “plowshare.” More…
acetabulum – The socket of the hip bone, into which the head of the femur fits. More…
birn – The socket in a clarinet or other woodwind into which the mouthpiece fits. More…