noun
definition
A rhombus.
definition
A rhombohedron.
Examples of rhomb in a Sentence
Bohemia has the form of an irregular rhomb, of which the northernmost place, Buchberg, just above Hainspach, is at the same time the farthest north in the whole AustroHungarian monarchy.
The fourth side of the rhomb is formed by the so-called Bohemian-Moravian Hills, a plateau or broad series of low hills, composed of primitive rocks, and attaining in some places an altitude of 2500 ft.
The six small faces s{412} situated on alternate corners at each end of the crystal, are called the "rhomb" faces, because of their shape; if extended they would give a trigonal bipyramid.
Chirocrinus-alter, one of of the nervous, waterthe Rhomb i fera, showing the reduced vascular and blood-vas number and regular arrangement of the cular systems, testified thecal plates, and the concentration of to their Pelmatozoan ancestry.
That this is not a necessary characteristic of light was discovered by Christian Huygens, who found that, whereas a stream of sunlight in traversing a rhomb of spar in any but one direction always gives rise to two streams of equal brightness, each of these emergent streams is divided by a second rhomb into two portions having a relative intensity dependent upon the position with respect to one another of the principal planes of the faces of entry into the rhombs - the planes through the axes of the crystals perpendicular to the refracting surfaces.
In intermediate cases the intensities of the two beams are proportional to the squares of the cosines of the angles that the principal plane of the second rhomb makes with the positions in which they have the greatest intensity.
This term has been retained and the ordinary stream is said to be plane polarized in the principal plane of the face of entry into the rhomb, and the extraordinary stream to be plane polarized in the perpendicular plane.
In order to isolate a polarized pencil of rays with a rhomb of Iceland spar, it is necessary to have a crystal of such a thickness that the emergent streams are separated, so that one may be stopped by a screen.
Common light, circularly polarized and partially circularly polarized light all have the characteristic of giving two streams of equal intensity on passing through a rhomb of Iceland spar, however it may be turned.
They may, however, be distinguished by the fact that on previous transmission through a quarter-wave plate this property is retained in the case of common light, while with the two other types the relative intensity of the streams depends upon the orientation of the rhomb, and with circularly polarized light one stream may be made to vanish.
Plane polarized light gives in general two streams of unequal intensity when examined with a rhomb, and for certain positions of the crystal there isonly one emergent stream.
This is the principle of Fresnel's rhomb, that is sometimes employed instead of a quarter-wave plate for obtaining a stream of circularly polarized light.
The clavicles rest on a large discoidal, rhomb o i d a 1, or T-shaped median bone, which clearly corresponds to the interclavicle of reptiles.