from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A joint, such as the elbow, in which a convex part of one bone fits into a concave part of another, allowing motion in only one plane.
from the GNU version of the Collaborative International Dictionary of English
- n. Any joint resembling a hinge, by which two pieces are connected so as to permit relative turning in one plane.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a freely moving joint in which the bones are so articulated as to allow extensive movement in one plane
- n. a joint allowing movement in one plane only
Sorry, no etymologies found.