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Having internal cheek pouches; as, the pouched squirrels. Pouched dog. (Zoöl.) See Zebra wolf, under Zebra. -- Pouched frog (Zoöl.), the nototrema, the female of which has a dorsal pouch in which the eggs are hatched, and in which the young pass through their brief tadpole stage. -- Pouched gopher, or Pouched rat. (Z…

Ignition in an internal-combustion engine while the inlet valve is open or before compression is completed.

age produced by double refraction is thrown out of the field by total reflection from the internal cemented surface, and the extraordinary, or polarized, image alone is transmitted.

An internal dorsal chitinous process between the first two divisions of the thorax of insects.

An internal muscle arising from the lumbar vertebræ and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas.

Genesis through an internal force, as opposed to natural selection.

An engine, usually an internal-combustion engine of a certain type (the radial type) having several cylinders arranged radially like the spokes of a complete wheel. The semiradial engine has radiating cylinders on only one side of the crank shaft.

t, and producing photographic and fluorescent effects by which means pictures showing the internal structure of opaque objects are made, called radiographs, or sciagraphs. So called from the discoverer, W. C. Röntgen. -- X ray, the Röntgen ray; -- so called by its discoverer because of its enigmatical character, x bei…

the crystal in the form of a cone, the vertex of which is at the point of emergence; and internal conical refraction, in which the ray is changed into the form of a cone on entering the crystal, from which it issues in the form of a hollow cylinder. This singular phenomenon was first discovered by Sir W. R. Hamilton b…

e thin membrane which separates the canal of the cochlea from the vestibular scala in the internal ear.

ods. (Physiol.) See 2d Note under Food, n., 1. -- Respiratory tree (Zoöl.), the branched internal gill of certain holothurians.

One of the three judges of the internal regions; figuratively, a strictly just judge.

To grove; to channel; especially, to groove internally with spiral channels; as, to rifle a gun barrel or a cannon.

ves; the saphenous opening, an opening in the broad fascia of the thigh through which the internal saphenous vein passes.

A fleshy covering of a seed, lying between the external and internal integuments.

stinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut.

from the first development of constitutional symptoms to the time when the bones and the internal organs become involved. -- Secondary tint, any subdued tint, as gray. -- Secondary union (Surg.), the union of wounds after suppuration; union by the second intention.

e operated by electricity, compressed air, a spring, or an explosive gas), attached to an internal- combustion engine, as on an automobile, and used as a means of starting the engine without cranking it by hand.

Designating an internal-combustion engine of a type resembling the Diesel engine in using as fuel heavy oil which is injected in a spray just before the end of the compression stroke and is fired without electrical ignition. The fuel is sprayed into an iron box (called a hot bulb or hot pot) opening into the combustion…

disagreeable, produced either by an external object (stimulus), or by some change in the internal state of the body. Perception is only a special kind of knowledge, and sensation a special kind of feeling. . . . Knowledge and feeling, perception and sensation, though always coexistent, are always in the inverse ratio…