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A revolving disk on which figures drawn in different relative attitudes are seen successively, so as to produce the appearance of an object in actual motion, as an animal leaping, etc., in consequence of the persistence of the successive visual impressions of the retina. It is often arranged so that the figures may be…

l manner and as a science; the investigation of the laws of human speech, the relation of different tongues to one another, and historical development of languages; linguistic science.

An apparatus for observing the phosphorescence produced in different bodies by the action of light, and for measuring its duration.

ng the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.

A process in which, by means of a number of photographs simultaneously taken from different points of view on the same level, rough models of the figure or bust of a person or animal may be made with great expedition.

ch may be brought into exactly the same plane, used in surveying and map making. From the differences between two pictures taken at the same moment, measurements in all dimensions of the region may be obtained.

The succession and variation of leaves during different seasons. R. Brown.

trees have pendent cones, which do not readily fall to pieces, in this and other respects differing from the firs.

) See under Dogfish. -- Picked out, ornamented or relieved with lines, or the like, of a different, usually a lighter, color; as, a carriage body dark green, picked out with red.

A commercial weight varying in different countries and for different commodities. In Borneo it is 135tan. [Written also pecul, and pecal.]

Variegated with spots of different colors; party-colored; spotted; piebald. "Pied coats." Burton. "Meadows trim with daisies pied." Milton. Pied antelope (Zoöl.), the bontebok. -- Pied-billed grebe (Zoöl.), the dabchick. -- Pied blackbird (Zoöl.), any Asiatic thrush of the genus Turdulus. -- Pied finch (Zoöl.) (a) T…

er Tremex. -- Pigeon wood (Bot.), a name in the West Indies for the wood of several very different kinds of trees, species of Dipholis, Diospyros, and Coccoloba. -- Pigeon woodpecker (Zoöl.), the flicker. -- Prairie pigeon. (Zoöl.) (a) The upland plover. (b) The golden plover. [Local, U.S.]

ning to, or derived from, or designating, a complex organic acid found in the products of different members of the Pepper family, and extracted as a yellowish crystalline substance.

A name given to apples of several different kinds, as Newtown pippin, summer pippin, fall pippin, golden pippin. We will eat a last year's pippin. Shak. Normandy pippins, sun-dried apples for winter use.

The mode of formation of the placenta in different animals; as, the placentation of mammals.

great trail or vexation. Shak. And men blasphemed God for the plague of hail. Wyclif. The different plague of each calamity. Shak.

A broad piece of sawed timber, differing from a board only in being thicker. See Board.

an animal or vegetable cell, out of which the various tissues are formed by a process of differentiation; protoplasm.

A trimming for the front of a woman's dress, made of a different material, and narrowing from the shoulders to the waist.

The property possessed by some crystals, of showing different colors when viewed in the direction of different axes.