from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Concave on one side and convex on the other.
- adj. Having greater curvature on the concave side than on the convex side. Used of a lens.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. having one side concave and the other convex
from the GNU version of the Collaborative International Dictionary of English
- adj. Concave on one side and convex on the other, as an eggshell or a crescent.
- adj. Specifically, having such a combination of concave and convex sides as makes the focal axis the shortest line between them. See Illust. under Lens.
from The Century Dictionary and Cyclopedia
- Concave on one side and convex on the other. A concavo-convex lens is a lens in which the convex face has a smaller curvature than the concave face, so that the former tends constantly away from the latter. See convex.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. concave on one side and convex on the other with the concavity being greater than the convexity
Sorry, no etymologies found.
The coins of these two Greek states in particular were for a long period concavo-convex disks, the convex side being in all instances the obverse.
(Gr. [Greek: kissos], ivy), biconvex; xystroidal or sistroidal (Gr. [Greek: xystris], a tool for scraping), concavo-convex; amphicoelic
Grain is orbicular to ovate, concavo-convex, red-brown, and transversely rugose.
The _leaf-blade_ is narrow, rigid, thickly coriaceous, concavo-convex tapering from the base to the tip, spreading and recurved, 4 to 6 inches long.
Grain is oblong, obtusely trigonous, or concavo-convex, red-brown and rugulose on the ventral side.
Below the frontonasal suture is the bridge of the nose, convex from side to side, concavo-convex from above downward, and formed by the two nasal bones supported in the middle line by the perpendicular plate of the ethmoid, and laterally by the frontal processes of the maxillæ which are prolonged upward between the nasal and lacrimal bones and form the lower and medial part of the circumference of each orbit.
On its anterior surface is a deeply concavo-convex facet, which articulates with the head of the malleus.
In this variety the opposing surfaces are reciprocally concavo-convex.
The Fifth Metacarpal Bone (os metacarpale V; metacarpal bone of the little finger) (Fig. 233) presents on its base one facet on its superior surface, which is concavo-convex and articulates with the hamate, and one on its radial side, which articulates with the fourth metacarpal.
The base presents a concavo-convex surface, for articulation with the greater multangular; it has no facets on its sides, but on its radial side is a tubercle for the insertion of the Abductor pollicis longus.