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ght in feet or weight in pounds of a column of the same body) which would be necessary to elongate a prismatic body of a transverse section equal to a given unit, as a square inch or foot, to double, or to compress it to half, its original length, were that degree of elongation or compression possible, or within the li…

A genus of extinct marine reptiles allied to the lizards, but having the body much elongated, and the limbs in the form of paddles. The first known species, nearly fifty feet in length, was discovered in Cretaceous beds near Maestricht, in the Netherlands. [Written also Mososaurus.]

Any fence made of pales or sharp stakes. Palisade cells (Bot.), vertically elongated parenchyma cells, such as are seen beneath the epidermis of the upper surface of many leaves. -- Palisade worm (Zoöl.), a nematoid worm (Strongylus armatus), parasitic in the blood vessels of the horse, in which it produces aneurisms,…

sweetbread, a gland connected with the intestine of nearly all vertebrates. It is usually elongated and light-colored, and its secretion, called the pancreatic juice, is discharged, often together with the bile, into the upper part of the intestines, and is a powerful aid in digestion. See Illust. of Digestive apparatu…

A roofing tile, of peculiar form, having a transverse section resembling an elongated S laid on its side (

oöl.), any flycatcher of the genus Terpsiphone, having the middle tail feathers extremely elongated. The adult male of T. paradisi is white, with the head glossy dark green, and crested. -- Paradise grackle (Zoöl.), a very beautiful bird of New Guinea, of the genus Astrapia, having dark velvety plumage with brilliant…

expansion of the integument uniting the fore limb with the body and extending between the elongated fingers to form the wing; in birds, the similar fold of integument uniting the fore limb with the body.

An elongated body or vein of ore.

containing the ovules or rudimentary seeds, and a stigma, which is commonly raised on an elongated portion called a style. When composed of one carpel a pistil is simple; when composed of several, it is compound. See Illust. of Flower, and Ovary.

A genus of diatoms of elongated elliptical shape, but having the sides slightly curved in the form of a letter S. Pleurosigma angulatum has very fine striations, and is a favorite object for testing the high powers of microscopes.

scale. Pomarine jager (Zoöl.), a North Atlantic jager (Stercorarius pomarinus) having the elongated middle tail feathers obtuse. The adult is black.

Stretched out; extended; especially, elongated in the direction of a line joining the poles; as, a prolate spheroid; -- opposed to oblate. Prolate cycloid. See the Note under Cycloid. -- Prolate ellipsoid or spheroid (Geom.), a figure generated by the revolution of an ellipse about its major axis. See Ellipsoid of rev…

A general term applied to the tissues formed of elongated cells, especially those with pointed or oblique extremities, as the principal cells of ordinary wood.

One of the two elongated vibratile young formed by fission of the embryo during the development of certain Gregarinæ.

A genus of air-breathing land snails having an elongated spiral shell. Coarctate, or Obtected, pupa, a pupa which is incased in the dried-up skin of the larva, as in many Diptera. -- Masked pupa, a pupa whose limbs are bound down and partly concealed by a chitinous covering, as in Lepidoptera.

Any plant or species of the genus Isoetes, cryptogamous plants with a cluster of elongated four-tubed rushlike leaves, rising from a corm, and containing spores in their enlarged and excavated bases. There are about seventeen American species, usually growing in the mud under still, shallow water. So called from the sh…

A flower cluster with an elongated axis and many one-flowered lateral pedicels, as in the currant and chokecherry. Compound raceme, one having the lower pedicels developed into secondary racemes.

ulum in such composite plants as the aster, goldenrod, daisy, and sunflower. They have an elongated, strap-shaped corolla, while the corollas of the disk flowers are tubular and five-lobed. -- Ray point (Geom.), the common point of a pencil of rays. -- Röntgen ray ( (Phys.), a kind of ray generated in a very highly e…

A genus of pterodactyls in which the elongated tail supported a leathery expansion at the tip.

An elongated pillar of ore or coal left as a support. Raymond.