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A hard, earthy ore of iron. Clay ironstone. See under Clay. -- Ironstone china, a hard white pottery, first made in England during the 18th century.

A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time, or for a certain period (mean height), as for a year; an isopiestic line. [Written also isobare.]

A line connecting the points on the surface of the earth where a certain temperature is found at the same depth.

A line connecting places on the earth's surface at which there is the same mean frequency of auroras.

A line connecting places on the earth having the same mean winter temperature. Cf. Isothere.

nation or dip; having equal inclination or dip. Isoclinal lines (Magnetism), lines on the earth's surface connecting places at which a dipping needle indicates the same inclination or dip.

A line connecting points on the earth's surface having the same mean temperature in the coldest month of the year.

ods that produce a similar amount of heat. -- Isodynamic lines (Magnetism), lines on the earth's surface connecting places at which the magnetic intensity is the same.

A line or curved surface passing beneath the earth's surface through points having the same mean temperature.

Of or pertaining to lines connecting places on the earth's surface which have a mean annual rainfall. -- n.

general equilibrium in the earth's crust, supposed to be maintained by the yielding or flow of rock material beneath the surface under gravitative stress. By the theory of isostasy each unit column of the earth, from surface to center, has approximately the same weight, and the continents stand higher than the ocean be…

A line connecting points on the earth's surface having the same mean summer temperature.

A line connecting or marking points on the earth's surface having the same temperature. This may be the temperature for a given time of observation, or the mean temperature for a year or other period. Also, a similar line based on the distribution of temperature in the ocean.

A line connecting or marking points on the earth's surface, which have the same mean summer rainfall.

Produce of the earth, or profits of land, tenements, or other property; as, A conveyed to B all his right for a term of years, with all the issues, rents, and profits.

n. During the Civil War it was called variously Yankee clover and Rebel clover. -- Japan earth. See Catechu. -- Japan ink, a kind of writing ink, of a deep, glossy black when dry. -- Japan varnish, a varnish prepared from the milky juice of the Rhus vernix, a small Japanese tree related to the poison sumac.…

A deep, broad-mouthed vessel of earthenware or glass, for holding fruit, preserves, etc., or for ornamental purposes; as, a jar of honey; a rose jar. Dryden.

An earthnut. Dr. Prior.

per opal, a yellow variety of opal resembling jasper. -- Jasper ware, a delicate kind of earthenware invented by Josiah Wedgwood. It is usually white, but is capable of receiving color.

sonage, who, for his cruelty to the Savior during his passion, is doomed to wander on the earth till Christ's second coming.