from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Anatomy See ball-and-socket joint.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A ball-and-socket joint.
from the GNU version of the Collaborative International Dictionary of English
- n. A ball and socket joint, or the kind of articulation represented by such a joint. See articulation.
from The Century Dictionary and Cyclopedia
- n. In anatomy, a ball-and-socket joint; a kind of movable arthrosis or free articulation which consists in the socketing of a convex end of a bone in a concavity of another bone, forming a joint freely movable in every direction. The hip and shoulder are characteristic examples. Also enarthrodia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone
Greek enarthrōsis, from enarthros, jointed : en-, in; see en-2 + arthron, joint; see ar- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)